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All questions of January Week 1 for Class 10 Exam
Can you explain the answer of this question below:Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is- A:16Ω
- B:4Ω
- C:12Ω
- D:20Ω
The answer is b.
Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is
A:
16Ω
B:
4Ω
C:
12Ω
D:
20Ω
|
Anjana Khatri answered |
1/R = 1/4 + 1/4 + 1/4 + 1/4= 4/4= R = 1ΩThen, four such combination are connected in series Rtotal = 1 + 1 + 1 +1 = 4 Ω
Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is- a)16Ω
- b)4Ω
- c)12Ω
- d)20Ω
Correct answer is 'B'. Can you explain this answer?
Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is
a)
16Ω
b)
4Ω
c)
12Ω
d)
20Ω
|
Srishti Singh answered |
Then, four such combination are connected in series Rtotal = 1 + 1 + 1 +1 = 4 Ω
ATM is an example of- a)primary sector
- b)secondary sector
- c)tertiary sector
- d)all of these
Correct answer is option 'C'. Can you explain this answer?
ATM is an example of
a)
primary sector
b)
secondary sector
c)
tertiary sector
d)
all of these
|
Rohit Sharma answered |
ATM is an example of tertiary sector which is also known as service sector. ATM is a machine whose full name is Automated Teller Machine. It was invented in 1960 by John Shepherd - Barron.
The combined resistance of 6Ω and 12Ω connected in parallel is
- A:
6 Ω
- B:
2 Ω
- C:
18 Ω
- D:
4 Ω
The answer is d.
6 Ω
2 Ω
18 Ω
4 Ω
|
|
Raghav Bansal answered |
Explanation:- In parallel, we know ;
1/ R p = 1/R1 + 1/R2 + ----------
1/ Rp = 1/ 6 + 1/12
1/ Rp = 1/ 4
Therefore , Rp = 4 ohm.
1/ R p = 1/R1 + 1/R2 + ----------
1/ Rp = 1/ 6 + 1/12
1/ Rp = 1/ 4
Therefore , Rp = 4 ohm.
Two resistors 4Ω and 2Ω are connected in series, and potential difference of 12 V is applied across the combination. Then, the current through the circuit is:- a)4.5 A
- b)4 A
- c)2 A
- d)1 A
Correct answer is option 'C'. Can you explain this answer?
Two resistors 4Ω and 2Ω are connected in series, and potential difference of 12 V is applied across the combination. Then, the current through the circuit is:
a)
4.5 A
b)
4 A
c)
2 A
d)
1 A
|
|
Ananya Das answered |
Total resistance =4+2
=6
Current =V/R = 12/6
=2A
=6
Current =V/R = 12/6
=2A
Service is- a)tangible
- b)intangible
- c)both (a) and (b)
- d)physical Product
Correct answer is option 'C'. Can you explain this answer?
Service is
a)
tangible
b)
intangible
c)
both (a) and (b)
d)
physical Product
|
|
Yashika Singh answered |
Intangible products and services include things like insurance policies, tax preparation services and cell phone service contracts.
as i think option(b) is correct.
hope it will help u:)
The volume of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is- a)9.7 cm3
- b)77.6 cm3
- c)58.2 cm3
- d)19.4 cm3
Correct answer is option 'D'. Can you explain this answer?
The volume of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is
a)
9.7 cm3
b)
77.6 cm3
c)
58.2 cm3
d)
19.4 cm3
|
Rajeev Malik answered |
The volume of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is 19.404 cm^3.
Edge of the cube = 4.2 cm
i.e 2r = 4.2
r = 4.2/2 = 2.1 cm
h = 4.2 cm
Volume of the cone = 1/3 * pi * r^2 * h
=> 1/3 * 22/7 * 2.1 * 2.1 * 4.2
=> 19.404 cm^3
Hence, the volume of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is 19.404 cm^3.
Converting iron ore to steel is a part of- a)primary activity
- b)secondary activity
- c)tertiary activity
- d)all of these
Correct answer is option 'B'. Can you explain this answer?
Converting iron ore to steel is a part of
a)
primary activity
b)
secondary activity
c)
tertiary activity
d)
all of these
|
Ishan Choudhury answered |
All industrial and manufacturing work comes under secondary sector and activities and converting iron ore to steel is an industrial activity. Hence it comes under secondary activity.
The service sector includes activities such as:- a)agriculture, dairy, fishing and forestry
- b)making sugar, gur and bricks
- c)transport, communication and banking
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
The service sector includes activities such as:
a)
agriculture, dairy, fishing and forestry
b)
making sugar, gur and bricks
c)
transport, communication and banking
d)
None of these
|
|
Diana Nair answered |
Service sector is also called as tertiary sector.It helps other two sector by providing them services like transport, communication, banking etc..
So the answer is C
So the answer is C
The radius (in cm) of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is - a)4.2
- b)2.1
- c)8.1
- d)1.05
Correct answer is option 'B'. Can you explain this answer?
The radius (in cm) of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is
a)
4.2
b)
2.1
c)
8.1
d)
1.05
|
Akash Mehta answered |
Diameter of cone= edge of cube
Radius= edge of cube/2
=4.2/2
=2.1cm
The sectors are classified into public and private sector on the basis of:- a)Employment conditions
- b)The nature of economic activities
- c)Number of workers employed
- d)Ownership of enterprises
Correct answer is option 'D'. Can you explain this answer?
The sectors are classified into public and private sector on the basis of:
a)
Employment conditions
b)
The nature of economic activities
c)
Number of workers employed
d)
Ownership of enterprises
|
|
Radha Iyer answered |
Industries in the public sector are owned by the government while those in the private sector are owned by entrepreneurs.
In Public sector, the government owns most of the assets and provides all the services.In the Private sector, ownership of assets and delivery of services is in the hands of private individual or companies.
In Public sector, the government owns most of the assets and provides all the services.In the Private sector, ownership of assets and delivery of services is in the hands of private individual or companies.
Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is- a)16Ω
- b)4Ω
- c)12Ω
- d)20Ω
Correct answer is option 'B'. Can you explain this answer?
Four resistors of 4 ohm each are connected in parallel, four such combinations are then connected in series. Their total resistance is
a)
16Ω
b)
4Ω
c)
12Ω
d)
20Ω
|
Lekshmi Mishra answered |
Then, four such combination are connected in series Rtotal = 1 + 1 + 1 +1 = 4 Ω
Can you explain the answer of this question below:The decrease of resistance in parallel combination is due to:- A:The decrease in effective area of the cross-section.
- B:The increase in effective area of the cross-section.
- C:The decrease in effective length.
- D:None of the above
The answer is b.
The decrease of resistance in parallel combination is due to:
A:
The decrease in effective area of the cross-section.
B:
The increase in effective area of the cross-section.
C:
The decrease in effective length.
D:
None of the above
|
|
Rohan Kapoor answered |
Resistance (R)depends on the resistivity of the nuteial (pl. length of the oats' (Li and cross sectional area (A) of the material following the equation:
R = p* L/A
When hooking resistors in parallel, you are increasingthecross sectional area of the resistance path. If you like to use the water hose analogy, you are draining the tub (battery - power source)with two hoses (resistors)instead of one. It makes the tub move water (current) Faster because you have more paths (bigger cross sectional area) for the water to flow.
If you look at the original equation above you will notice that replacing A with 2A (two of the same resistors in parade) you will cut the resistance in half.
That's the theory. In practice. to find the resistance you would Ix/mayjust add the reciprocal ol the usevidual resistors to get the reciprocal of the total resistance
1/R -total = 1/RI + 1/R2 + 1/R3 + ....
for however many resistors you have in parallel. For example.
If you have only 2 resistors in parallel. a 50 ohm in parallel with a 100 ohm resistor then...
1/R - total = 1 /50 ohm + 1/100 ohm = 2/100 ohm + 1/100 ohm
= 3/100 ohm
so,
R - total = 103/3 = 33.3 ohm (most peocre forget die step)
A good rule to remember is that you total resistance is less than the smallest resistor when they are connected in parallel.
A cubical ice cream brick of edge 22 cm is to be distributed among some children by filling ice cream cones of radius 2 cm and height 7 cm upto its brim. How many children will get the ice cream cones?- a)163
- b)263
- c)363
- d)463
Correct answer is option 'C'. Can you explain this answer?
A cubical ice cream brick of edge 22 cm is to be distributed among some children by filling ice cream cones of radius 2 cm and height 7 cm upto its brim. How many children will get the ice cream cones?
a)
163
b)
263
c)
363
d)
463
|
|
Nature Lover answered |
When a number of resistors are connected in parallel, then their resultant resistance is ______________ the smallest individual resistance.- a)Less than
- b)Sometime less and sometimes greater than
- c)Same as
- d)greater than
Correct answer is 'B'. Can you explain this answer?
When a number of resistors are connected in parallel, then their resultant resistance is ______________ the smallest individual resistance.
a)
Less than
b)
Sometime less and sometimes greater than
c)
Same as
d)
greater than
|
Krishna Iyer answered |
When the resistors are connected in parallel then the net resistance is less than or greater than the smallest individual resistance.
When we produce a good by exploiting natural resources, it is an activity of the:- a)Secondary sector
- b)Tertiary sector
- c)Primary sector
- d)Organised sector
Correct answer is option 'C'. Can you explain this answer?
When we produce a good by exploiting natural resources, it is an activity of the:
a)
Secondary sector
b)
Tertiary sector
c)
Primary sector
d)
Organised sector
|
|
Amit Kumar answered |
When the economic activity depends mainly on exploitation of natural resources then that activity comes under the primary sector. Agriculture and its related activities are the primary sectors of economy. PRIMARY SECTOR is the economic sector that produce goods by exploiting the natural resources because it forms the base for all the products that are associated directly with land and water. Production of wheat, vegetables, milk , marble and coal are some examples of this sector.
The decrease of resistance in parallel combination is due to:- a)The decrease in effective area of the cross-section.
- b)The increase in effective area of the cross-section.
- c)The decrease in effective length.
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
The decrease of resistance in parallel combination is due to:
a)
The decrease in effective area of the cross-section.
b)
The increase in effective area of the cross-section.
c)
The decrease in effective length.
d)
None of the above
|
Sashya answered |
When the area of cross-section increases,electrons have more space to flow. Hence,the conductivity increases and resistance decreases.
What is the primary characteristic that differentiates the tertiary sector from the primary and secondary sectors?- a)It produces goods
- b)It provides support and services
- c)It focuses on agriculture
- d)It manufactures products
Correct answer is option 'B'. Can you explain this answer?
a)
It produces goods
b)
It provides support and services
c)
It focuses on agriculture
d)
It manufactures products
|
Nk Classes answered |
The tertiary sector is unique because it provides services and support rather than producing goods. For example, transportation and retail services support the distribution of goods produced by the primary and secondary sectors.
Which of the following sectors includes workers who are often involved in informal or temporary employment?- a)Organised Sector
- b)Public Sector
- c)Unorganised Sector
- d)Secondary Sector
Correct answer is option 'C'. Can you explain this answer?
a)
Organised Sector
b)
Public Sector
c)
Unorganised Sector
d)
Secondary Sector
|
EduRev Class 10 answered |
The unorganised sector is characterized by informal or temporary employment, with workers often facing irregular income and lack of job security. This sector includes small-scale businesses and informal employment settings.
What is disguised unemployment?- a)When workers are fully employed but underpaid
- b)When workers are employed but their skills are not fully utilized
- c)When workers are unable to find any work at all
- d)When workers receive high wages but are overworked
Correct answer is option 'B'. Can you explain this answer?
a)
When workers are fully employed but underpaid
b)
When workers are employed but their skills are not fully utilized
c)
When workers are unable to find any work at all
d)
When workers receive high wages but are overworked
|
|
EduRev Class 10 answered |
Disguised unemployment occurs when workers are employed but their skills are not fully utilized. This often happens in situations where more workers are employed than needed, leading to underutilization of labor. For example, if more people work on a farm than necessary, some workers may be underemployed.
In a swimming pool measuring 90 m x 40 m, 150 men take a dip. If the average displacement of water by a man is 8 m3, then rise in water level is- a)27.33 cm
- b)30 cm
- c)31.33 cm
- d)33.33 cm
Correct answer is option 'D'. Can you explain this answer?
In a swimming pool measuring 90 m x 40 m, 150 men take a dip. If the average displacement of water by a man is 8 m3, then rise in water level is
a)
27.33 cm
b)
30 cm
c)
31.33 cm
d)
33.33 cm
|
Anisha kapoor answered |
Volume of water displaced = 150 x 8 = 1200 m3
⇒ 90 x 40 x h = 1200
⇒
⇒ 90 x 40 x h = 1200
⇒
How does the tertiary sector contribute to the development of primary and secondary sectors?- a)By producing raw materials
- b)By providing supporting services
- c)By directly manufacturing goods
- d)By focusing on agriculture
Correct answer is option 'B'. Can you explain this answer?
a)
By producing raw materials
b)
By providing supporting services
c)
By directly manufacturing goods
d)
By focusing on agriculture
|
Aman kulkarni answered |
Understanding the Tertiary Sector's Role
The tertiary sector, also known as the service sector, plays a crucial role in the development of the primary and secondary sectors. It provides essential support that enhances their efficiency and effectiveness.
Supporting Services
- The tertiary sector includes services such as logistics, transportation, and communication, which help in the distribution of raw materials and finished goods.
- Financial services, including banking and insurance, provide the necessary capital and risk management for businesses in the primary and secondary sectors.
- Research and development services contribute to innovation, improving production techniques in agriculture (primary) and manufacturing (secondary).
Enhancing Productivity
- By offering training and education, the tertiary sector helps develop a skilled workforce that can operate in primary and secondary sectors more effectively.
- Technical support services ensure that machinery and equipment used in production are well-maintained and upgraded, leading to increased productivity.
Market Access
- The tertiary sector also plays a vital role in marketing and sales, helping producers in the primary sector (like farmers) gain access to markets.
- Retail services facilitate the sale of products manufactured in the secondary sector, ensuring that goods reach consumers efficiently.
Conclusion
In summary, the tertiary sector is integral to the growth of primary and secondary sectors by providing a wide range of supporting services. These services not only enhance productivity and efficiency but also ensure that goods and services flow smoothly through the economy.
The tertiary sector, also known as the service sector, plays a crucial role in the development of the primary and secondary sectors. It provides essential support that enhances their efficiency and effectiveness.
Supporting Services
- The tertiary sector includes services such as logistics, transportation, and communication, which help in the distribution of raw materials and finished goods.
- Financial services, including banking and insurance, provide the necessary capital and risk management for businesses in the primary and secondary sectors.
- Research and development services contribute to innovation, improving production techniques in agriculture (primary) and manufacturing (secondary).
Enhancing Productivity
- By offering training and education, the tertiary sector helps develop a skilled workforce that can operate in primary and secondary sectors more effectively.
- Technical support services ensure that machinery and equipment used in production are well-maintained and upgraded, leading to increased productivity.
Market Access
- The tertiary sector also plays a vital role in marketing and sales, helping producers in the primary sector (like farmers) gain access to markets.
- Retail services facilitate the sale of products manufactured in the secondary sector, ensuring that goods reach consumers efficiently.
Conclusion
In summary, the tertiary sector is integral to the growth of primary and secondary sectors by providing a wide range of supporting services. These services not only enhance productivity and efficiency but also ensure that goods and services flow smoothly through the economy.
Which of the following is a measure to address unirrigated land in the farming sector?- a)Setting up agro-based mills
- b)Cooperative marketing societies
- c)Procurement of food grains by the government
- d)Construction of canals by the government
Correct answer is option 'D'. Can you explain this answer?
a)
Setting up agro-based mills
b)
Cooperative marketing societies
c)
Procurement of food grains by the government
d)
Construction of canals by the government
|
Kamna Science Academy answered |
Unirrigated land can be addressed by increasing water availability, which is typically achieved through the construction of canals. Canals help in irrigating land that lacks water sources, thus improving crop productivity.
Which of the following is NOT a reason why workers in the unorganised sector are considered to be exploited?- a)Low wages
- b)Lack of job security
- c)High wages
- d)Absence of medical benefits
Correct answer is option 'C'. Can you explain this answer?
a)
Low wages
b)
Lack of job security
c)
High wages
d)
Absence of medical benefits
|
|
EduRev Class 10 answered |
Workers in the unorganised sector are exploited due to low wages, lack of job security, and absence of medical benefits. High wages would not be a reason for exploitation.
Which of the following is a common feature of the unorganised sector?- a)High job security
- b)Regular medical benefits
- c)High wages
- d)Lack of formal employment benefits
Correct answer is option 'D'. Can you explain this answer?
a)
High job security
b)
Regular medical benefits
c)
High wages
d)
Lack of formal employment benefits
|
|
Kamna Science Academy answered |
The unorganised sector is characterized by a lack of formal employment benefits such as job security, medical benefits, and regular wages. This results in the exploitation of workers.
Match the column
- a)1 → A, 2 → C, 3 → D, 4 → E
- b)1 → F, 2 → B, 3 → C, 4 → E
- c)1 → B, 2 → C, 3 → D, 4 → E
- d)1 → F, 2 → E, 3 → C, 4 → A
Correct answer is option 'B'. Can you explain this answer?
Match the column
a)
1 → A, 2 → C, 3 → D, 4 → E
b)
1 → F, 2 → B, 3 → C, 4 → E
c)
1 → B, 2 → C, 3 → D, 4 → E
d)
1 → F, 2 → E, 3 → C, 4 → A
|
|
EduRev Class 10 answered |
Correct Option: (b) 1 → F, 2 → A, 3 → C, 4 → E
Which sector includes jobs like teaching, banking, and transportation?- a)Primary Sector
- b)Secondary Sector
- c)Tertiary Sector
- d)Unorganised Sector
Correct answer is option 'C'. Can you explain this answer?
a)
Primary Sector
b)
Secondary Sector
c)
Tertiary Sector
d)
Unorganised Sector
|
|
Kamna Science Academy answered |
The tertiary sector includes service-oriented jobs such as teaching, banking, and transportation. These jobs support other sectors and do not involve direct production of goods.
A shuttle cock used for playing badminton has the shape of the combination of- a)a cylinder and a sphere
- b)a cylinder and a hemisphere
- c)a sphere and a cone
- d)frustum of a cone and a hemisphere
Correct answer is option 'D'. Can you explain this answer?
A shuttle cock used for playing badminton has the shape of the combination of
a)
a cylinder and a sphere
b)
a cylinder and a hemisphere
c)
a sphere and a cone
d)
frustum of a cone and a hemisphere
|
|
Vaibhav Roy answered |
Explanation:
The shuttlecock used in playing badminton has a unique shape that helps it to move swiftly through the air. The shape of a shuttlecock is the combination of two 3D shapes - a frustum of a cone and a hemisphere.
Frustum of a Cone: The top part of the shuttlecock is shaped like the frustum of a cone. A frustum of a cone is a 3D shape that is formed when the top part of a cone is cut off parallel to the base. The frustum of a cone has two circular bases, one larger than the other, and a curved surface.
Hemisphere: The bottom part of the shuttlecock is shaped like a hemisphere. A hemisphere is a 3D shape that is formed when a sphere is cut in half. A hemisphere has a curved surface and a circular base.
Combination of Frustum of a Cone and Hemisphere: The shuttlecock is made by joining the frustum of a cone and hemisphere at their circular bases. The frustum of a cone forms the top part of the shuttlecock, while the hemisphere forms the bottom part.
The frustum of a cone and hemisphere are combined to create the unique shape of the shuttlecock. This shape helps the shuttlecock to move swiftly through the air and change direction easily, making it perfect for playing badminton.
The shuttlecock used in playing badminton has a unique shape that helps it to move swiftly through the air. The shape of a shuttlecock is the combination of two 3D shapes - a frustum of a cone and a hemisphere.
Frustum of a Cone: The top part of the shuttlecock is shaped like the frustum of a cone. A frustum of a cone is a 3D shape that is formed when the top part of a cone is cut off parallel to the base. The frustum of a cone has two circular bases, one larger than the other, and a curved surface.
Hemisphere: The bottom part of the shuttlecock is shaped like a hemisphere. A hemisphere is a 3D shape that is formed when a sphere is cut in half. A hemisphere has a curved surface and a circular base.
Combination of Frustum of a Cone and Hemisphere: The shuttlecock is made by joining the frustum of a cone and hemisphere at their circular bases. The frustum of a cone forms the top part of the shuttlecock, while the hemisphere forms the bottom part.
The frustum of a cone and hemisphere are combined to create the unique shape of the shuttlecock. This shape helps the shuttlecock to move swiftly through the air and change direction easily, making it perfect for playing badminton.
In the city of Surat, what percentage of workers are employed in small workshops usually not registered with the government?- a)15%
- b)20%
- c)50%
- d)70%
Correct answer is option 'C'. Can you explain this answer?
a)
15%
b)
20%
c)
50%
d)
70%
|
|
Kamna Science Academy answered |
In Surat, 50% of the workers are employed in small workshops that are usually not registered with the government. This contributes to the unorganised sector's large share of employment.
What is the primary purpose of the National Rural Employment Guarantee Act (NREGA) 2005?- a)To promote private sector industries
- b)To provide guaranteed 100 days of employment in a year
- c)To privatize government enterprises
- d)To eliminate unemployment in urban areas
Correct answer is option 'B'. Can you explain this answer?
a)
To promote private sector industries
b)
To provide guaranteed 100 days of employment in a year
c)
To privatize government enterprises
d)
To eliminate unemployment in urban areas
|
|
EduRev Class 10 answered |
NREGA 2005 was introduced to guarantee 100 days of employment per year to individuals seeking work in rural areas. It aims to provide income security and create additional job opportunities.
Chapter doubts & questions for January Week 1 - Weekly Tests for Class 10 Preparation 2025 is part of Class 10 exam preparation. The chapters have been prepared according to the Class 10 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 10 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Weekly Tests for Class 10 Preparation
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