Physics 1995 JAMB Past Questions

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If a resistance is halved in value and the potential difference across it is tripled, then the ratio of the new current to the old one is

A. 1 : 6
B. 1 : 3
C. 2 : 1
D. 6 : 1

View Answer & Discuss (3) JAMB 1995

A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is

A. 16.0A
B. 8.0A
C. 0.8A
D. 0.4A

View Answer & Discuss (4) JAMB 1995

The purpose of a dielectric material in a parallel plate capacitor is to

A. increase its capacitance
B. decrease its capacitance
C. insulate the plate from each other
D. increase the magnetic field between the plates

View Answer & Discuss (16) JAMB 1995

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An electric current of 2 amperes flows in a heating coil of resistance 50 ohms for 3 minutes 20 seconds. Determine the heat produced

A. 0.5kJ
B. 8.0kJ
C. 20.0kJ
D. 40.0kJ

View Answer & Discuss (9) JAMB 1995

If the maximum voltage across a 100ohms resistor is 20V, then the maximum power it can dissipate is

A. 5.00W
B. 4.00W
C. 2.00W
D. 25W

View Answer & Discuss (5) JAMB 1995

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