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Physics Past Questions and Answers

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Physics Questions

Question 2346:

What is the value of R when G shows no deflection in the circuit illustrated above?

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A 80Î©
B 75Ω
C 45Î©
D 20Î©
E 10Î©

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Question 2347:

A charge of 1.0 x 10^-5 Coulombs experience force of 40N at a certain point in space. What is the electric field intensity?

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A 8.00 x 10⁶NC^-1
B 4.00 x 10⁶NC^-1
C 4.00 x 10^-4NC^-1
D 2.00 x 10^-4NC^-1
E 2.50 x 10^-1NC^-1

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Question 2348:

If the frequency of the ac. circuit illustrated above is 500/Ï€ Hz what would be the reactance in the circuit?

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A 0.0009Î©/Ï€
B 100Ω
C 1030Î©
D 1400Î©
E 2500Î©

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Question 2349:

Calculate the resistance of the filament of a lamp rates 240 V, 40 W

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A 240Î©
B 360Ω
C 720Î©
D 1440Î©
E 2880Î©

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Question 2350:

Birds can perch safely on overhead electric power cables without being electrocuted because

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A Birds can withstand high p.d. of the electric power cables
B Any accumulated charge on the birds is quickly dissipated
C The feet of the birds are well insulated
D The current is a.c. and has particular direction
E There is no p.d between the birds and the cables

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