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Monday, 04 May 2026
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Physics Past Questions and Answers

Jamb Physics Questions

Question 191:
Which of the following is NOT directly associated with direct current (DC)?
  • A A dry cell
  • B A moving coil galvanometer
  • C A transformer
  • D A lead- acid accumulator
  • E A commutator
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Question 192:
The relationship between the period T and the length T of a smile pendulum is T = 2\( \pi \) \( ( \frac{I}{g}) ^{ \frac{1}{2} } \). From experiment data of T and I, one can obtain the following graphs, i. T vs.I ii. T vs I2 iii. T2 vs. I iv. T vs \( \sqrt{I} \) v. logT vs logI. Which of the following graphs, are linear?
  • A All
  • B Only i and ii
  • C Only iii and iv
  • D Iii,iv and v
  • E None of them
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Question 193:
A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil.If the input voltage is 100 volts, the output voltage is
  • A 5 volts
  • B 10 volts
  • C 15 volts
  • D 20 volts
  • E 25 volts
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Question 194:
A closed coil of wire is placed near a magnet. The magnet lies along the axis of the coil. Under which of the following conditions would there be no current in the coil?
  • A When the coil is moved toward the stationary magnet
  • B When the coil is moved away from the stationary magnet
  • C When the coil is held stationary but the magnet is moved towards the coil
  • D When both the coil and the magnet are held stationary
  • E When the coil is held stationary but the magnet is moved away from the cell
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Question 195:
If I is the current passing through a metallic resistor and H is the rate of Heat generated in the resistor at a constant temperature, then
  • A H \(\alpha\) \(\frac{1}{I}\)
  • B H \(\alpha\) \(\frac{1}{I^2}\)
  • C H \(\alpha\) \(\sqrt1\)
  • D H \(\alpha\) I<sup style='font-size: smaller;'>2</sup>
  • E None of the above
View Answer & Explanation