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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Unit of time

Jamb Physics Questions - Unit of time

Question 1:
If in a simple pendulum experiment the length of the inextensible string is increased by a factor of four, its period is increased by a factor of
  • A 4
  • B \(\frac{\pi}{2}\)
  • C \(\frac{1}{4}\)
  • D 2\(\pi\)
  • E 2
View Answer & Explanation
Question 2:
In a certain fusion reaction, a deuteron (\(^{2}_{1}H\)) interacts with a triton (\(^{3}_{1}He\)) and produces an a-particle (\(^{4}_{2}He\)) and a second product. The second product is
  • A A proton
  • B An electron
  • C A neutron
  • D A gamma ray
View Answer & Explanation
Question 3:
A boy timed 30 oscillations of a certain pendulum thrice and obtained 1min. 10s, 1min. 12s and 1min. 7s respectively.The mean period of oscillation of the pendulum is
  • A 0.14s
  • B 0.43s
  • C 2.32s
  • D 6.97s
View Answer & Explanation
Question 4:
Calculate the time taken for a mango fruit that fall from the tree 20 m to the ground [g = 10 ms-2]
  • A 10s
  • B 5s
  • C 4s
  • D 2s
View Answer & Explanation
Question 5:
The length of the seconds hand of laboratory clock is 0.1m. Calculate the speed at the top of the seconds hand
  • A 1.05 à— 10\(^{-2}\)ms\(^{-1}\)
  • B 1.85 × 10\(^{-4}\)ms\(^{-1}\)
  • C 9.50 à— 10\(^{-1}\)ms\(^{-1}\)
  • D 5.25 à— 10\(^{-3}\)ms\(^{-1}\)
View Answer & Explanation