Physics Past Questions and Answers

THe velocity of sound in air at 16oC is 340ms-1. What will it be when the pressure is doubled and its temperature raised to 127oC?

A 400 ms-1
B 4,000 ms-1
C 8,000 ms-1
D 160,000 ms-1

Question 1507:

Three capacitors of capacitance 2Î¼F, 4Î¼Fand 8Î¼F are connected in parallel and a P.D of 6V is maintained across each capacitor, the total energy stored is

A 2.52 x 10-6J
B 6.90 x 10-6J
C 2.52 x 10-4J
D 6.90 x 10-4J

Question 1508:

A cell of e.m.f 12V and internal resistance 4Î© is connected to an external resistor of resistance 2Î©. Find the current flow.

A 5 A
B 4 A
C 3 A
D 2 A

Question 1509:

The diagram above shows a balanced metre bridge, the value of x is

A 75.0 cm
B 66.7 cm
C 33.3 cm
D 25.0 cm

Question 1510:

Three 4Î© resistors connected in parallel have a potential difference of 16 V applied across them. What is the total current in the circuit?

A 14 A
B 12 A
C 10 A
D 8 A