Previous year questions with solutions · 2025 – 2026
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 9 | 19 | 0.47 | 1.89% ▼ 25% vs last year |
| 2025 | 12 | 19 | 0.63 | 2.53% |
A transverse wave on a string is described by y=3 (36t+0.018x+ /4 ), where x, y are in cm and t in seconds. The least distance between the two successive crests in the wave is cm. (Nearest integer) ( =3.14)
Two tuning forks A and B are sounded together giving rise to 8 beats in 2 s. When fork A is loaded with wax, the beat frequency is reduced to 4 beats in 2 s. If the original frequency of tuning fork B is 380 Hz then original frequency of tuning fork A is Hz.
The velocity of sound in air is doubled when the temperature is raised from 0 to . The value of is .
Two loudspeakers (L1 and L2) are placed with a separation of 10 m, as shown in figure. Both speakers are fed with an audio input signal of same frequency with constant volume. A voice recorder, initially at point A, equidistant from both loudspeakers, is moved by 25 m along the line AB while monitoring the audio signal. The measured signal was found to undergo 10 cycles of minima and maxima during the movement. The frequency of the input signal is Hz (Speed of sound in air is 324 m/s and 5 = 2.23) [figure]