Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 
Assertion (A): The electric bulbs glow immediately when switch is on.
Reason (R): The drift velocity of electrons in a metallic wire is very high.

In the light of the above statements choose the correct answer from the options given below:
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Current & Current Density |
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The plot of current \(I~\text{(A)}\) flowing through a metallic conductor versus the applied voltage \(V~\text{(volt)}\) across the ends of a conductor is:

1.   2.
3. 4.
Subtopic:  Derivation of Ohm's Law |
 79%
From NCERT
NEET - 2022
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 
Assertion (A):  In a meter bridge experiment null point for an unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by increasing the value of the standard resistance. 
Reason (R): Resistance of metal increases with an increase in temperature.

In the light of the above statements choose the correct answer from the options given below:
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Wheatstone Bridge |
 61%
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Which of the following \((\text{I-V})\) graphs represents ohmic conductors? 

1. 2.
3. 4.
Subtopic:  Derivation of Ohm's Law |
 83%
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Figure (i) and figure (ii) both are showing the variation of resistivity \((\rho)\) with temperature (T) for some materials. Identify the type of these materials.

  

1. conductor and semiconductor 
2. conductor and Insulator 
3. insulator and semiconductor 
4. both are conductors 

Subtopic:  Derivation of Ohm's Law |
 84%
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Kirchhoff's junction rule is a reflection of:
a. Conservation of the current density vector.
b. Conservation of charge.
c. The fact that the momentum with which a charged particle approaches a junction is unchanged (as a vector) as the charged particle leaves the junction.
d. The fact that there is no accumulation of charges at a junction.

Which of the above statements are correct?
1. (b) and (c)
2. (a) and (c)
3. (b) and (d)
4. (c) and (d)

Subtopic:  Kirchoff's Current Law |
 70%
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Given below are two statements: 
Statement I: Kirchhoff’s current law is a consequence of the conservation of energy as applied to electric circuits.
Statement II: Kirchhoff’s voltage law is a consequence of the conservation of charge.
 
1. Statement I is incorrect and Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct and Statement II is incorrect.
Subtopic:  Kirchoff's Voltage Law |
 68%
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A battery consists of a variable number \(n\) of identical cells (having internal resistance \(r\) each) which are connected in series. The terminals of the battery are short-circuited and the current \(I\) is measured. Which of the graphs shows the correct relationship between \(I\) and \(n?\)

1.   2.
3. 4.
Subtopic:  Grouping of Cells |
 66%
From NCERT
NEET - 2018
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Given below two statements:
Statement I: Kirchhoff’s junction law follows the conservation of charge. 
Statement II: Kirchhoff’s loop law follows the conservation of energy.
1. Both Statement I and Statement II are incorrect.
2. Statement I is correct but Statement II is incorrect.
3. Statement I is incorrect and Statement II is correct.
4. Both Statement I and Statement II are correct.
Subtopic:  Kirchoff's Voltage Law |
 82%
From NCERT
AIPMT - 2010
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A cell having an emf \(\varepsilon\) and internal resistance \(r\) is connected across a variable external resistance \(R\). As the resistance \(R\) is increased, the plot of potential difference \(V\) across \(R\) is given by:

1. 2.
3. 4.
Subtopic:  EMF & Terminal Voltage |
 61%
From NCERT
AIPMT - 2012
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