Physics Past Questions and Answers

The handle of a screw jack is 35 cm long and pitch of the screw is 0.5 cm. What force must be applied at the end of the handle to lift a load of 2000N, if the efficiency of the jack is 30% [π = 22/7]?

A 152.0N
B 132.0N
C 15.2N
D 440.0N

Question 2042:

The inductive reactance in a circuit of frequency 100Hz is 1ohms. Calculate the inductance of the inductor[π = 3.14]

A 2.00 x 10\(_{-3}\)H
B 1.59 x 10\(_{-3}\)H
C 1.09 x 10\(_{-3}\)H
D 6.28x 10\(_{-3}\)H

Question 2043:

The diagram illustrates the velocity- time graph of a body. Calculate the distance covered by the body. during the motion.

A 15m
B 84m
C 72m
D 48m

Question 2044:

An atom that emits an a-particle?

A May become a different element.
B Becomes a different isotope of the element.
C Daughter with increased mass.
D Becomes a daughter of a different element always.

Question 2045:

Which of the following units is equivalent to the unit of electric current?

A C s\({-1}\)
B W
C J s\({-1}\)
D C