NVS PGT Physics Mock Test - 6 - NVS TGT/PGT MCQ

The correct answer is Inscriptions.

Key Points

• Writings on hard surfaces like stone or metal are called Inscriptions.
• Often kings got their orders inscribed so that people could see, read and obey them.
• Other inscriptions have the activities done by men and women recorded on them.
• Kings kept record of their victories in the form of inscriptions.

 Thus, we can say that writings on hard surfaces like stone and metals are called Inscriptions.

Additional Information

•  Manuscripts were written on palm leaves or birch.

The correct answer is Ethyl mercaptan.

Key Points

• The stench due to leakage from the LPG cylinder because of Ethyl mercaptan.
  • LPG gas is basically propane and butane.
  • It is odourless in its natural state.
  • The smell that you notice when there is a leak is actually the stench of an entirely different agent, called ethyl mercaptan​.
    • This substance is added to the gas when it leaves the main storage terminals.
• Hence, option 4 is correct.

• Methane :
  • Methane is a chemical compound with the chemical formula CH₄.
  • Methane is a one-carbon compound in which the carbon is attached by single bonds to four hydrogen atoms
  • It is a group-14 hydride and the simplest alkane and is the main constituent of natural gas.
  • It is a colourless, odourless, non-toxic but flammable gas.
  • It has a role as a fossil fuel, a member of greenhouse gas, and a bacterial metabolite.
• Butane :
  • Butane or n-butane is an alkane with the formula C₄H₁₀.
  • Butane is a gas at room temperature and atmospheric pressure.
  • Butane is a highly flammable, colourless, easily liquefied gas that quickly vaporizes at room temperature.
  • Butane is a hydrocarbon and a highly flammable, colourless, odourless, easily liquefied gas.
  • It is typically used as fuel for cigarette lighters and portable stoves, a propellant in aerosols, a heating fuel, a refrigerant.
• Propane :
  • Propane is a three-carbon alkane with the molecular formula C₃H₈.
  • It is a gas at standard temperature and pressure, but compressible to a transportable liquid. 
  • Propane is a flammable hydrocarbon gas that is liquefied through pressurization and commonly used for fuel in heating, cooling, hot water, and vehicles.
  • Propane can also be used for refrigerants, aerosol propellants, and petrochemical feedstock.​ 

The correct answer is Magnesium.

Key Points

• The outermost shell of a Magnesium element has two electrons.
  • 12 is the atomic mass for magnesium.
  • it is in group 2 of the periodic table, which it loses,
  • so it can attain stability by losing the electron and its outermost shell will be complete by achieving (2,8) configuration 
  • it has a charge of +2, as it still has 12 protons (positive charges) and now has only 10 electrons (negative charges).
  • Magnesium is used in products that benefit from being lightweight, such as car seats, luggage, laptops, cameras, and power tools.
  • It is also added to molten iron and steel to remove sulfur. 
• Outermost Shell :
  • This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
  • In general, atoms are most stable, least reactive, when their outermost electron shell is full.

Additional Information

• Carbon is a chemical element with the symbol C and atomic number 6.
  • It is nonmetallic and tetravalent-making four electrons available to form covalent chemical bonds.
  • It belongs to group 14 of the periodic table. 
  • Carbon typically shares electrons to achieve a complete valence shell, forming bonds with multiple other atoms.
• Boron is a chemical element with the symbol B and atomic number 5.
  • The boron atom has only six electrons in its outer shell, leading to an electron deficiency.
  • This molecule has 12 valence shell electrons, 3 each from the B atoms, and 1 each from the six H atoms.
    • Electrons per shell: 2,3
    • Atomic Mass: 10.811 g/mol
• Chlorine atom consists of 17 protons (positively charged sub-atomic particles) in the atom's nucleus (central region), balanced by seventeen electrons (negatively charged sub-atomic particles) distributed around the nucleus.

A man walks 30 meters towards South, then turning to his right, he walks 30 meters, then turning to his left, he walks 20 meters, again turning to his left, he walks 30 meters. The figure are given below -

50 meters far is he from his starting point.

Hence, "50 meters" is the correct answer.

 is the same as 1 × 4 : 1 × 3 i.e., 4 : 3

Share of A 

Share of B 

Difference = 48 - 36 = 12

Alternatively:

Since the ratio is 4 : 3, the difference is 

The difference of the profits 

The logic follows here is:

In fig 1:

12 = 6 ÷ 2 × 4

12 = 3 × 4 

12 = 12

In fig 2:

80 = 20 ÷ 2 × 8

80 = 10 × 8

80 = 80

Similarly,

63 = ? ÷ 2 × 21

63 / 21 = ? ÷ 2

3 = ? ÷ 2

? = 3 × 2

? = 6

Hence, the correct answer is "6".

Hence. the person will be allowed to appear in the interview.

The meaning of synonym is Similar.

Similarly;

The meaning of Opposite is Adverse.

Hence, "Adverse" is the correct answer.

Additional Information

Multimedia files can be easily downloaded as and when required.

A multimedia file can be any computer file that plays audio and video, audio only, or video only. Some examples of popular multimedia files include the . mp3 audio file, . mp4, video, and avi video, and wmv files.

So, only statement 2 is true

Identification of Terms:
1. It is also referred to as a web address.
2. It specifies the internet address of a file stored on a host computer or server connected to the internet.

The terms in question can be identified as follows:
1. Web browser:
- A web browser is a software application used to access and view websites on the internet.
- It allows users to interact with web pages, access information, and navigate the internet.
2. URL (Uniform Resource Locator):
- A URL is a string of characters that specifies the location of a resource on the internet.
- It is also commonly referred to as a web address.
- A URL consists of various components, including the protocol (e.g., HTTP or HTTPS), the domain name (e.g., www.example.com), and optional path or parameters.
3. DNS (Domain Name System):
- DNS is a hierarchical decentralized naming system for computers, services, or other resources connected to the internet.
- It translates domain names (e.g., www.example.com) into IP addresses that can be understood by computers.
- DNS plays a crucial role in resolving domain names to their corresponding IP addresses.
4. Hyperlink:
- A hyperlink is a reference or navigation element within a document that allows users to jump directly to a different location.
- It can be text, an image, or any other object that can be clicked or activated to access another resource or webpage.
Conclusion:
Based on the given descriptions, the correct identification for the terms is as follows:
1. Web browser - A software application used to access and view websites on the internet.
2. URL - A web address that specifies the location of a resource on the internet.

Opening MS-Word: Sequence of Steps
To open MS-Word, you need to follow the correct sequence of steps. The correct sequence is:
Step 1:
Click on the "Start" button from the Windows taskbar.
Step 2:
Navigate to the "Programs" or "All Programs" option.
Step 3:
Look for the "MS-Office" folder or the "Microsoft Office" folder within the Programs menu.
Step 4:
Click on the "MS-Office" or "Microsoft Office" folder to expand it.
Step 5:
Within the MS-Office or Microsoft Office folder, locate the "MS-Word" or "Microsoft Word" application.
Step 6:
Click on the "MS-Word" or "Microsoft Word" application to open it.
Example:
For example, if you are using Windows 10, the sequence of steps would be:
Start → Programs → MS-Office → MS-Word
Note: The exact sequence of steps may vary slightly depending on the version of Windows and MS-Office you are using. However, the general procedure remains the same.
Conclusion:
By following the correct sequence of steps, you can easily open MS-Word and start working on your documents.

Objective questions are beneficial to assess the knowledge of the complete syllabus in short time. Maximum syllabus can be covered by making objective type questions. Hence, this is the ideal way to assess whether the child has prepared entire syllabus or not.

Curie’s law in magnetism states that the magnetic susceptibility of paramagnetic materials is inversely proportional to its absolute temperature and it is given by: χ_m = C/T

Given that two sources produce pure sound notes as follows: y1= 0.008 sin (604 n t) y2= 0.007 sin (610 n t) To find the number of beats heard by a person at the location, we need to first understand the concept of beats.

Beats: When two sound waves of slightly different frequencies are superimposed, we hear a periodic variation in the loudness of sound. This variation is called beats.

The number of beats heard per second is given by the difference between the frequencies of the two sound waves.

Mathematically, the beat frequency is given by fbeat = |f1 - f2| where f1 and f2 are the frequencies of the two sound waves. In this problem, the frequencies of the two sound waves are 604 n and 610 n, respectively.

Therefore, the beat frequency is fbeat = |604 n - 610 n| = 6 n Since the beat frequency is 6 n, the number of beats heard per second is 6. Since each beat corresponds to two sound waves (one from each source), the total number of sound waves heard per second is twice the number of beats, which is 12.

However, the question asks for the number of distinct sounds heard, which is equal to the number of beats. Therefore, the answer is 3 (Option A).
 

Angular frequency of the ac signal w=2πν
∴ w=2π(50)=100π
Capacitive reactance X_c​=1/wC​
∴ X_c​=1/(100π×786×10⁻⁶)​=4Ω
Inductive reactance X_L​=w_L
∴ X_L​=100π×(25.48×10−3)=8Ω
Impedance of the circuit Z=√[R²+(X_L​−X_c​)²​]
∴ Z=√[3²+(8−4)²​]=5Ω
 Phase difference ϕ=tan⁻¹[(XL​−Xc​​)R]
Or ϕ=tan⁻¹((8−4​)/3)=tan⁻¹(4/3​)
⟹ ϕ=53.13o
Power factor cosϕ=cos53.13o=0.6
Power dissipated in the circuit
P=I_v²R
Now, Iv=I₀/√2=E₀/√2Z=283/(1.414×5)=40A
∴P=I_v²R=(40)²×3=4800 watt

We know that the total work done by gravity is always equal to the gravitational force in magnitude as it is a conservative force and as because no other non conservative force acts upon the body we can say the mechanical energy remains conserved. Thus we get the potential energy at top is exactly equal to KE just before the ball hitting the ground.

The correct answer is option D
In A,B,C there is a single source (coherent source)while in D there is an interference of thin films whose sources are different ,therefore not coherent.

Effective voltage is also known as root mean square value of voltage of alternating current in an AC circuit.
we know, E_rms=E_peak/ √2 
where E_rms  denotes the rms voltage and E_peak peak voltage in an ac circuit.
here, peak voltage , E_peak =423 volts
so, effective voltage , E_rms  =423/√2  ≈ 300 volts
hence, effective voltage is 300 volts
The correct answer is option C.

A small negatively charged body placed at X would be pushed to the right

 

The negative charge feels a force opposite to the direction of field.

 Other cases are not possible from properties of electric lines of force.

• Stronger magnetic field, thicker material and low resistivity material will increase the size and effect of eddy current whereas thinner material will reduce the effect of eddy currents.

In calcite crystal there is a phenomenon of double refraction. So, we see one dot as a stationary object whereas the other being refracted at a little displaced position seems to be rotating about the first dot.

Work function=0.5
for 1ev photon
1ev=0.5+kinetic energy
k.E=0.5ev
for 2.5ev photon
2.5ev=0.5ev+k.E
k.E=2ev
ratio of above2 k.E give ratio of square of velocity =1:4
taking square root
finelly the ratio of velocity =1:2ans

By conservation of momentum we get the speed of the bigger part let say, v = 1 x90 / 3
Hence we get v = 30
Thus the total KE of the system after collision is ½ (3 X 900 + 1 X 8100)
Thus KE = ½ (10800) = 5400
Now  if we apply WET to the system, as no external force has acted upon it, we get
W = ΔKE
= 5400 - 0
= 5.4 kJ

Equating magnetic force to centripetal force,

Time to complete one revolution,

Rule- The object in the active voice becomes the subject in the passive voice and the subject in the active voice becomes the object in the passive voice.This is valid in both ways (Active to passive and vice-versa). Further, the verb is changed to the past participle form. 

उपर्युक्त में से उत्क्षिप्त व्यंजन है - 'ड़, ढ़'

• उत्क्षिप्त का अर्थ होता है फेंकना या फेंका हुआ है।
• अतः वें व्यंजन जिनके उच्चारण में जिह्वा का अग्र भाग वेग से ऊपर उठकर मूर्धा से टकराकर तुरन्त उसी वेग से नीचे लौट आता है,
• उन्हें उत्क्षिप्त व्यंजन के साथ ताड़नजात व्यंजन या द्विस्पृष्ट व्यंजन भी कहते हैं।
• सिर्फ 'ड़, ढ़' ताड़नजात व्यंजन या द्विस्पृष्ट व्यंजन कहते हैं।न

Key Pointsकुछ महत्वपूर्ण वर्ण के उच्चारण-स्थान:-

• कंठ्य (गले से) :- क, ख, ग, घ, ङ
• तालव्य (कठोर तालु से) :- च, छ, ज, झ, ञ, य, श
• मूर्धन्य (कठोर तालु के अगले भाग से) :- ट, ठ, ड, ढ, ण, ड़, ढ़, ष
• दंत्य (दाँतों से) :- त, थ, द, ध, न
• वर्त्स्य (दाँतों के मूल से) :- स, र, ल
• ओष्ठय (दोनों होंठों से) :- प, फ, फ़, ब, भ, म
• दंतौष्ठय (निचले होंठ व ऊपरी दाँतों से) :- व

सही उत्तर 'जोगन' है।

• 'जोगन' शब्द में महाप्राण व्यंजनों का प्रयोग नहीं हुआ है।
• जोगन' शब्द में अल्पप्राण व्यंजनों का प्रयोग हुआ है।
• अल्पप्राण व्यंजन वह व्यंजन होतें हैं जिन्हें बहुत कम वायु-प्रवाह से बोला जाता है जैसे कि 'क', 'ग', 'ज' और 'प'।
• इनकी संख्या 15 होती है।

Key Points अन्य विकल्पों का विश्लेषण:

• खीझ, झूठ और घाघ शब्दों में महाप्राण व्यंजनों का प्रयोग हुआ है।

• भाषा विज्ञान में महाप्राण व्यंजन वह व्यंजन होतें हैं जिन्हें मुख से वायु-प्रवाह के साथ बोला जाता है, जैसे की 'ख', 'घ', 'झ' और 'फ'।

Additional Information