Physics Past Questions and Answers

N.N.P.C. gas cylinder containing 15kg of cooking gas was left open, and the gas emptied in 3.8 minutes, at an average speed of 20 ms^-1. What force was exerted on the gas in the cylinder?

A 132N
B 13.2N
C 1.32N
D 0.132N
E 0.013N

Question 67:

An object placed 15cm from a converging lens forms a real image whose magnification is 2.0. What is the focal length of the lens?

A 5.00cm
B 10.00cm
C 15.00 cm
D 18.00 cm
E 20.00cm

Question 68:

Which statement about the concept of temperature is NOT true?

A Temperature decides the direction of heat flow between two bodies
B Temperature is a measure of coldness of a body
C Temperature is a vector quantity
D Temperature is a measure of hotness of a body.
E Temperature scales include Fahrenheit, Celsius and Kelvin

Question 69:

Which is a stringed Instrument?

A Drum
B Flute
C Piano
D Saxophone
E Trumpet

Question 70:

The statement that the mechanical advantage of a machine is 3 means that the ____________

A Efficiency is 33\(\frac{1}{3}\)%
B Effort is three times as large as the load
C Mechanical advantage is 3 times as large as the velocity ratio
D Ratio of the effort to the load is 1: 3
E Velocity ratio is 3