Jamb Physics 2006 Past Questions and Answers

Question 11:

• JAMB 2006

The production and type of charge of a body can only be accounted for by the?

A. Deficiency or surplus of electrons
B. Equibrium in protons and neutrons
C. Deficiency or surplus of protrons
D. Deficiency or surplus of neutrons

Question 12:

• JAMB 2006

The main purpose of the transformer in an a.c radio set is to?

A. Increase power to the radio
B. Step up the voltage
C. Convert energy from a.c to d.c
D. Step down the voltage

Question 13:

• JAMB 2006

An electric heater with a p.d of 240 V connected across its terminals has a total resistance of 960Ω. find the power rating of the heater.

A. 0.25 W
B. 4.00 W
C. 38.40W
D. 60.00W

Question 14:

• JAMB 2006

If the capacitance of an capacitor is C = (εA)/d, which of the following parameters is varied when a variable capacitors is used for tuning radio sets?

A. Constant (ε) and area
B. Area and distance.
C. Constant (ε) only
D. Distance only

Question 15:

• JAMB 2006

When an a.c. voltage is applied to a capacitor, no power is consumed because the current

A. Leads the voltage by 90°
B. Lags behind the voltage by 90°
C. And voltage are in phase
D. And voltage are 180° out of phase