NVS PGT Physics Mock Test - 5 - NVS TGT/PGT MCQ

CONCEPT:

Galvanometer:

• A galvanometer is used for detecting current in an electric circuit.
• The galvanometer is the device used for detecting the presence of small currents and voltage or for measuring their magnitude.
• The galvanometer is mainly used in the bridges and potentiometer where they indicate the null deflection or zero current.
• The potentiometer is based on the premise that the current sustaining coil is kept between the magnetic field experiences a torque.

EXPLANATION:

• From the above, it is clear that the galvanometer is the instrument used for detecting the presence of electric current in a circuit. Therefore option 1^st is correct.

​Additional Information 

Mistake Point
Difference between Ammeter and Galvanometer:

• The ammeter shows only the magnitude of the current.
• The galvanometer shows both the direction and magnitude of the current.

The logic follows here is:-

1st and 3rd letters are interchanged.

4th and 6th letters are interchanged.

And 2nd letter is placed as it is.

Similarly,

Hence, the correct answer is "TNMFED".

1) 6941 ⇒ the square boxing ring

2) 5713 ⇒ put the box out

In 1) and 2) one number is common i. e. ‘1’ and one word is common i. e. ‘the’.

Hence, in code language, 1 = the

3) 1259 ⇒ box in the ring

In 1) and 3) two number are common i. e. 1 and 9, and also two words are common i. e. ‘the’ and ‘ring’.

But we know 1 is the code number for ‘the’, implies 9 is the code number for ‘ring’.

Code for 1 is the.

Code for 5 is box.

Code for 9 is ring.

Hence, "9" is the correct answer.

According to the information given in the question, we can draw the following diagram.

BC = 24 m
FC = ED = 12 m
FC = 12 m
Thus point F is in the west w.r.t to point C and 12 m from point C.
Hence, the correct answer is "12 m west".

The logic follows here is:

In a figure:

Middle number = (Top number × bottom number) - (left number × right number) 

In fig 1:

Middle number = (9 × 10) - (7 × 8)

= 90 - 56

= 34

In fig 2:

Middle number = (12 × 8) - (8 × 7)

= 96 - 56

= 40

Similarly,

In fig 3:

Middle number = (11 × 7) - (4 × 9) 

? = 77 - 36

? = 41

Hence, the correct answer is "41".

The pattern followed here is:

Hence, the correct answer is "L".

Domain Name ".org" Represents Organization

The domain name ".org" is a top-level domain (TLD) that represents organizations. It is one of the original generic top-level domains established in 1985 along with .com, .net, .gov, and .edu. Here is a detailed explanation of why ".org" represents organizations:

• Definition: ".org" stands for organization, which is a group of people working together towards a common goal or purpose.


• Intended Use: The ".org" domain was initially intended for non-profit organizations, but it has since been expanded to include for-profit organizations as well.


• Common Usage: Many well-known organizations, such as the Red Cross, Amnesty International, and Wikipedia, use the ".org" domain for their websites.


• Identification: The ".org" domain is often associated with credibility, trustworthiness, and a dedication to a cause or mission.


• Open Registration: Unlike some other TLDs, there are no specific requirements or restrictions for registering a ".org" domain. It is open to any individual, business, or organization.


• Alternative Meanings: While the primary meaning of ".org" is organization, it can also be interpreted as organic in some contexts. However, when it comes to domain names, ".org" predominantly represents organizations.

In conclusion, the domain name ".org" represents organizations, both non-profit and for-profit, and is widely used by various reputable organizations around the world.

Allowing the students to make mistakes is important for them to learn problem solving skills, to be responsible and to make certain decisions on their own.
If students are instructed on everything and are not allowed to make mistakes, they may lose self confidence, stop trying new things and even become rebellious.

Liking for the profession not only in teaching but any other activity is foremost important to emerge out successfully. A teacher can effectively achieve this only if he has liking for his profession and he puts in all his efforts for the same.

e = NBAω = 20 x 3 x 10^-2 x (3.14 x 0.08 x 0.08) x 50 = 0.603C

average power loss due to joule heating

Ultrasound waves are a type of a sound wave which is longitudinal in nature while others are electromagnetic waves because they are transverse in nature.

For alternating current average value is taken for half cycles only,
Let, I=I0sinωt where ω=2π/T

=[(I₀/ω) cosωt]_o^T/2 x 2/T
I_avg=2I_o/ π

The maximum range of water coming out of the fountain,
R_m = v²/g
Total area around fountain,

As the two identical coaxial circular loops carry a current i each circulating in the same direction, their flux add each other. When the two are brought closer, the total flux linkage increases. By Lenz's law a current will be induced in both the loops such that it opposes this change in flux. As the flux increases, the current in each loop will decrease so as to decrease the increasing flux.

Work required to turn the dipole is given by
W=MB[cosθ_i- cosθ_f]
Here θi is the initial angle made by a dipole with a magnetic field and   is the final angle made by a dipole with a magnetic field.
magnetic moment is normal to the field direction.
so, θ_i=0 and θ_f=90
W = 1.5 × 0.22 [ cos0° - cos90° ]
W = 0.33J
 
magnetic moment is opposite to the field direction.
so, θ_i=0 and θ_f=180
now, W = 1.5 × 0.22 [ cos0° - cos180°]
= 0.33 [ 1 - (-1) ]
= 0.66 J

Explanation:if a ball is thrown upward at an angle? The ball has a vertical and a horizontal component of velocity. The force of gravity is acting on it and its acceleration is in the downward direction. The vertical component of velocity is therefore changing. As the motion and acceleration is in opposite direction so vertical component of velocity decrease.

Answer :- b

Solution :-  f = 75hz

w=2πf

= 2 * π * 75

= 150π

E(max) = (2)^½ E(rms)

E(max) = 1.414 * 200

= 282.8V

E(ins) = E(max)sinwt

E(ins) = 282.8 sin 150πt

According to Ohm's law R=V/I​ 
Where R= resistance, V= Voltage, I= Current
Also R  is directly proportional to temperature T and inversely proportional to the slope.
∴ from the above example
R₁​∝T₁​ and R₂​∝T₂​
but from given figure R₁​<R₂​
∴T_1​<T₂

There is no current inside the pipe. Therefore

Electric flux is given by  since amount of charge not depends on size and shape so by making radius <  double the amount of charge remain same so electric flux remain same.

• When a conductive material is subjected to a time-varying magnetic flux, eddy currents are generated in the conductor.
• These eddy currents circulate inside the conductor generating a magnetic field of opposite polarity as the applied magnetic field. The interaction of the two magnetic fields causes a force that resists the change in magnetic flux.
• However, due to the internal resistance of the conductive material, the eddy currents will be dissipated into heat and the force will die out. As the eddy currents are dissipated, energy is removed from the system, thus producing a damping effect.

P(t)=V_mI_mSin²ωt
P(t)=0.5V_mI_m(2sin2ωt)
P(t)= 0.5V_mI_m(1-cos2ωt)
Therefore, frequency is doubled for the instantaneous power so, frequency of instantaneous power is 100Hz.
 

Psychologist Albert Bandura is the researcher most often associated with learning through observation. He and others have demonstrated that we are naturally inclined to engage in observational learning.

New education Policy 2020 lays particular emphasis on the development of the creative potential of each individual.

• It is based on the principle that education must develop not only cognitive capacities - both the ‘foundational capacities ’of literacy and numeracy and ‘higher-order’ cognitive capacities, such as critical thinking and problem-solving – but also social, ethical, and emotional capacities and dispositions. 
• Experiential learning is synchronous with critical thinking. Critical thinking is the intellectual process of conceptualizing, applying, analyzing, synthesizing, and/or evaluating information. 
• National Education Policy 2020 proposes that experiential learning should be encouraged to promote critical thinking. 

Important Points

• NEP 2020 is the 21st Century’s first education policy in India. The development of the creative potential of each student is emphasized in the National Education Policy 2020. 
• New Policy aims for Universalization of Education from pre-school to secondary level with 100 % GER in school education by 2030.
• NEP 2020 will bring 2 crores, out-of-school children, back into the mainstream. New 5+3+3+4 school curriculum with 12 years of schooling and 3 years of Anganwadi/ Pre-schooling.

Additional Information

• NEP 2020 does not focus on rote memorization or recall. 

Hence, we can conclude that the right answer to this question is experiential learning; critical thinking.  

The correct option is Option 2, i.e., ‘get down to’.
The sentence talks about a manager telling his subordinates that enough discussion was done and it was time to work. The phrasal verb ‘get down to’ means ‘to get serious about something’. Hence, the correct option is Option 2.

The sentence shows a prediction that India will hold talks with Afghanistan in the future on militancy. It depicts a simple future form in nature. Thus, as it is already in the said simple future tense, no further improvement is required.
Hence option 4 is correct.

The word 'conceited' means 'excessively proud of oneself'.

The sentence talks about Rick who is a vain person.

This implies that whenever his wife gives an opinion different from his, his response would not be a positive one.

The correct word is 'belittle' which means 'dismiss as unimportant'. 

बल-वल इसका सही उत्तर विकल्प 3 ताकत-मेघ​ है। अन्य विकल्प इसके अनुचित हैं।
Key Points

• बल का अर्थ – ताकत
• वल का अर्थ – मेघ

Additional Information