Physics - Modern Physics Question with Solution | TestHub
Match Column-I with Column-II.
List - I | List - II |
|---|---|
(A) The speed is increasing with time. | (P) A heavy ball is dropped in a viscous liquid. |
(B) The speed is decreasing with time. | (Q) A particle is free to move along the x-axis, released from with zero initial velocity. , where is a positive constant. |
(C) The magnitude of acceleration is increasing with time. | (R) A transverse sine wave propagates along the positive x-axis. Consider point P on the wave.
|
(D) The magnitude of acceleration is decreasing with time. | (S) A photoelectron is emitted from a cathode as shown. The area of the plates is very large.
|
| (T) An object moves towards a converging lens with constant speed along its principal axis. It is between the focus and optical centre. Consider its image.
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Options:
Answer:
Solution:
P: speed increases and acceleration decreases as viscous drag grows.
Q: makes both speed and acceleration increase.
R: the marked point approaches an extreme, so speed decreases and acceleration magnitude increases.
S: uniform field gives increasing speed and constant acceleration.
T: image speed and acceleration magnitude decrease as the object approaches the optical centre.
