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Monday, 15 June 2026
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Physics Past Questions and Answers

Jamb 2012 Physics Questions

Question 96:
In a Daniel cell, the depolarizer, positive and negative electrodes are respectively
  • A Copper sulphate, copper and zinc
  • B Manganese dioxide, carbon and zinc
  • C Sulphuric acid, lead oxide and lead
  • D Potassium hydroxide, nickel and iron.
View Answer & Explanation
Question 97:
when a piece of rectangular glass block is inserted between two parallel capacitor,at constant plate area and distance of separation, the capacitance of the capacitor will
  • A Increase
  • B Decrease
  • C Decrease then increase
  • D Remain constant
View Answer & Explanation
Question 98:
the ratio of electrostatic force FE to gravitational force FG between two protons each of charge e and mass m, at a distance d is
  • A E/4πԐoGm
  • B E<sup style='font-size: smaller;'>2</sup>/Gm<sup style='font-size: smaller;'>2</sup>
  • C Gm<sup style='font-size: smaller;'>2</sup>/4πԐoe<sup style='font-size: smaller;'>2</sup>
  • D E<sup style='font-size: smaller;'>2</sup>/4πԐoeGm<sup style='font-size: smaller;'>2</sup>
View Answer & Explanation
Question 99:
A cell can supply current of 0.4 A and 0.2 A through a 4.0Ω and 10.0Ω resistors respectively.
This internal resistance of the cell is
  • A 2.0Ω
  • B 1.0Ω
  • C 2.5Ω
  • D 1.5Ω
View Answer & Explanation
Question 100:
The particles emitted when \( ^{39}_{19}K \text{ decay to } ^{39}_{19}K \) is
  • A Gamma
  • B Beta
  • C Electron
  • D Alpha
View Answer & Explanation