Jamb Physics 2012 Past Questions and Answers

Question 96:

• JAMB 2012

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.

Question 97:

• JAMB 2012

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

Question 98:

• JAMB 2012

the ratio of electrostatic force F_E to gravitational force F_G between two protons each of charge e and mass m, at a distance d is

A. E/4πԐoGm
B. E²/Gm²
C. Gm²/4πԐoe²
D. E²/4πԐoeGm²

Question 99:

• JAMB 2012

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

Question 100:

• JAMB 2012

The particles emitted when \( ^{39}_{19}K \text{ decay to } ^{39}_{19}K \) is

A. Gamma
B. Beta
C. Electron
D. Alpha