A metallic resistor is connected across a battery. If the number of collisions of the free electrons with the lattice is somehow decreased in the resistor (for example, by cooling it), the current will:
1. increase
2. decrease
3. remain constant
4. become zero

Subtopic:  Derivation of Ohm's Law |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two resistors A and B have resistances RA and RB respectively with RA < RB . The resistivities of their materials are ρA and ρB

1.   ρA > ρ

2.   ρA = ρB 

3.   ρA < ρ

4.   The information is not sufficient to find the relation between ρA and ρB

Subtopic:  Derivation of Ohm's Law |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The product of resistivity and conductivity of a cylindrical conductor depends on

1.   temperature

2.   material

3.   area of cross-section

4.   none of these.

Subtopic:  Derivation of Ohm's Law |
 56%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

As the temperature of a metallic resistor is increased, the product of its resistivity and conductivity:

1. increases
2. decreases
3. remains constant
4. may increase or decrease
Subtopic:  Derivation of Ohm's Law |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In an electric circuit containing a battery, the charge (assumed positive) inside the battery:

1. always goes from the positive terminal to the negative terminal.
2. may go from the positive terminal to the negative terminal.
3. always goes from the negative terminal to the positive terminal.
4. does not move.
Subtopic:  Grouping of Cells |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A resistor of resistance \(R\) is connected to an ideal battery. If the value of \(R\) is decreased, the power dissipated in the resistor will:
1. increase.
2. decrease.
3. remain unchanged.
4. Can't be determined.

Subtopic:  Heating Effects of Current |
 68%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions respectively.

1.   K1 < K2

2.   K1 = K2

3.   K1 > K2

4.   Any of these three may occur

Subtopic:  Current & Current Density |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two resistors \(R\) and \(2R\) are connected in series in an electric circuit. The thermal energy developed in \(R\) and \(2R\) are in the ratio of:
1. \(1:2\)
2. \(2:1\)
3. \(1:4\)
4. \(4:1\)

Subtopic:  Heating Effects of Current |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two resistances R and 2R are connected in parallel in an electric circuit. The thermal energy developed in R and 2R are in the ratio

1.   1 : 2

2.   2 : 1

3.   1 : 4

4.   4 : 1.

Subtopic:  Heating Effects of Current |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A uniform wire of resistance \(50~\Omega\) \(\) is cut into \(5\) equal parts. These parts are now connected in parallel. The equivalent resistance of the combination is:

1. \(2~\Omega\) \(\) 2. \(10~\Omega\) \(\)
3. \(250~\Omega\) \(\) 4. \(6250~\Omega\) 
Subtopic:  Derivation of Ohm's Law |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch