Physics Past Questions and Answers

A work of 30 joules is done is transferring 5 millicoulombs of charge from a point B to a point A in an electric Held. The potential difference between B and A is

A 1.7 x 10^-4V
B 3.4x10^-4V
C 1.5x10^-1V
D 6.0 x10³V
E 1.2 x10⁴V

Question 152:

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

A 80Î©
B 75Ω
C 45Î©
D 20Î©
E 10Î©

Question 153:

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?

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

Question 154:

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

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

Question 155:

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

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