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Physics Past Questions and Answers

Jamb Physics Questions

Question 1731:

The force on a current carrying conductor in a magnetic field is greatest when the

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A Conductor makes an angle of 60Â° with the field
B Force is idependent of the angles between the fields and the conductor
C Conductor is parallel with the field
D Conductor is at right angle with the field

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Question 1732:

A transistor function mainly as a

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A Switch and amplifier
B Rectifier and an amplifier
C Charge storer and an amplifier
D Charge storer and a switch

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Question 1733:

Energy losses through eddy currents are reduced by using

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A Low resistance wires
B Insulated soft iron wires
C Few turns of wires
D High resistance wires

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Question 1734:

A capacitor of 20 x 10<sup style='font-size: smaller;'>-12</sup>F and an inductor are joined in series. The value of the inductance that will give the circuit a resonance frequency of 200kHz is

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A I/16 H
B I/8 H
C I/64 H
D I/32 H

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Question 1735:

The magnetic force on a charged particle moving with velocity v is

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A Proportional to both the magnitude of the charge and the velocity v
B Independent of the magnitude of the charge
C Proportional to the velocity v only
D Proportional to the magnitude of the charge only

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