Physics 1997 JAMB Past Questions

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The power dissipated in an a.c. circuit with an r.m.s, current of 5A, r.m.s voltage of 10V and a phase angle of 60^o is

A. 25W
B. 50W
C. 120W
D. 125W

View Answer & Discuss (5) JAMB 1997

The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [\(\pi\) = 3.142]

A. 50.0Hz
B. 100.0Hz
C. 311.0Hz
D. 314.2Hz

View Answer & Discuss (7) JAMB 1997

In a purely inductive circuit, the current

A. lags behind the voltage in phase by 90^o
B. leads the voltage in phase by 90^o
C. is in the same phase with the voltage
D. leads the voltage by 180^o

View Answer & Discuss (2) JAMB 1997

One of the features of the fission process is that

A. its products are not radioactive
B. it leads to chain reaction
C. neutrons are not released
D. the sum of the masses of the reactants equals the sum of masses of the products

View Answer & Discuss (2) JAMB 1997

The graphite rods surrounding the uranium fuel rods in a nuclear reactor, are used to

A. absorb the neutrons and hence halt the nuclear process
B. create the neutrons and hence slow up the nuclear process
C. slowdown the neutrons and hence slow up the nuclear process
D. speed up the neutrons and hence speed up the nuclear process

View Answer & Discuss (4) JAMB 1997

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Physics 1997 JAMB Past Questions

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