CBSE 12th Current Electricity Predicted Question 2025: Physics Preparation

CBSE 12th Current Electricity Predicted Question 2025: The Central Board of Secondary Education (CBSE) will be conducting the CBSE 12th Physics exam on February 21, 2025, in pen and paper mode. Candidates can check the CBSE 12th Current Electricity Predicted Question 2025 here for their reference. The provided questions are based on PYQs, sample/model questions, and other repeated topics. Apart from Current Electricity, topics such as Electric charges and fields, Moving charges and magnetism, Laws of Physics, Concave and convex mirrors, Electrostatic potential and capacitance, Thermodynamics, Carnot engine, and Centripetal and centrifugal force are also very important. The CBSE 12th Current Electricity Predicted Question 2025 for Physics preparation is available below.

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CBSE 12th Current Electricity Predicted Question 2025: Physics Preparation

Candidates can check the CBSE 12th Current Electricity Predicted Question 2025 for Physics Preparation below.

Q1. In a Wheatstone bridge, if resistance P is increased, then the condition for the balanced state can be restored by:

1. Increasing the resistance R
2. Decreasing the resistance Q
3. Increasing the resistance S
4. Decreasing the resistance R

1. Only (1)
2. Both (1) and (II)
3. Both (II) and (IV)
4. Only (IV)

Answer: A. Only (1)

Q2. Two wires of the same material having radii in the ratio 1: 2, carry currents in the ratio 4: 1. The ratio of drift velocities of electrons in them is:

1. 2:1
2. 1:1
3. 1:4
4. 16:1

Answer: D. 16:1

Q3. The emf of the battery is equal to its terminal potential difference

1. only when the battery is being charged
2. only when the large current is in the battery
3. only when there is no current in the battery
4. under all conditions

Answer: C. Only when there is no current in the battery

Q4. Read the following passage and answer the questions that follow:
We can control the speed of the fans at our homes by moving the regulator to and fro. Here the current flowing through the fan is controlled by regulating the resistance through the regulator. A circular knob on the component can be related to achieve a variable resistance on the output terminals. For any specific value of the input, we can calculate the resistance, current, and thus power flowing through the conductor.

An electric heater is connected to the voltage supply, and after few seconds, the current gets its steady value then its initial current will be:

1. equal to its steady current
2. slightly higher than its steady current
3. slightly less than its steady current
4. zero

Answer: B. slightly higher than its steady current

Q5. In the equation AB = C, A is the current density, C is the electric field, then B is:

1. resistivity
2. conductivity
3. potential difference
4. resistance

Answer: B. conductivity

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