AP Inter 2nd Year Physics Answer Key 2025 (Available) with Exam Analysis, Student Reviews

Question

TS Inter 1st Year Mathematics 1B Answer Key 2025

1. Define 'power' of a convex lens. What is its unit?

The power of a convex lens is its ability to converge light rays, quantified as the reciprocal of its focal length (in meters), and measured in diopters (D).

2. What is the principle of a moving coil galvanometer?

A moving coil galvanometer works on the principle that a current-carrying coil experiences a torque when placed in a magnetic field. The coil deflects, and the amount of deflection is proportional to the amount of current passing through the coil.

3. Magnetic lines form continuous closed loops. Why?

Magnetic lines form continuous closed loops because magnetic poles always come in pairs. Magnetic monopoles don't exist in nature.

4. Define magnetic declination.

Magnetic declination is the angle between magnetic north and true north. It's also called magnetic variation.

5. A transformer converts 200 V ac into 2000 V ac. Calculate the number of turns in the secondary if the primary has 10 turns.

Vs/Vp = Ns/NpVp = 200V Vs = 2000V Np = 10

6. What are the applications of microwaves?

Microwaves have diverse applications, ranging from cooking and communication to medical diagnostics and radar systems, leveraging their unique properties for various tasks.

7. Write down Einstein's photoelectric equation.

Einstein represented the equation with the formula of Ek = hf − ϕ.

8. What important fact did Millikan's experiment establish?

Robert Millikan's oil drop experiment established that the charge of an electron is quantized and has a fixed value.

9. What happens to the width of depletion layer in p-n junction when it is (i) forward biased and (ii) reverse biased

In a p-n junction diode, the width of the depletion layer decreases when forward biased and increases when reverse biased.

10. What are the basic blocks of a communication system?

The fundamental blocks of a communication system are a source (or transmitter), a channel, and a receiver.

Parameter

Exam Analysis 2025

Overall difficulty level of the paper

Moderate to Tough

Difficulty Level of Section A

Easy to Moderate

Difficulty Level of Section B

Moderate to Tough

Difficulty Level of Section C

Moderate to Tough

Expected Good Score

45+

Time-Consuming Question (If any)

Questions in Question C were a bit time consuming

Topics with Maximum Weightage

To be Updated

2nd Year AP Inter Physics Question Paper 2025 PDF (Available)