Question 4806:

Which of the following affects the period of simple pendulum? (I) mass of pendulum bob (II) length of the pendulum (III) acceleration due to gravity

A. I, II, and III
B. II and III only
C. I and III only
D. I and II only

Question 4807:

A boy sits in a train moving with a uniform speed on a straight track-if from his outstretched palm he gently tossed a coin vertically upwards, the coin will fall ____________

A. In front of him palm
B. Behind his palm
C. Beside of his palm
D. Into his palm

Question 4808:

A machine required \(100 \mathrm{~J}\) of work to raise a load of \(500 \mathrm{~N}\) through Avertical distance of \(1.5 \mathrm{~m}\). Calculate the efficiency of the machine.

A. \(80 \%\)
B. \(75 \%\)
C. \(60 \%\)
D. \(33 \%\)

Question 4809:

One of the most important application of bimetallic strip is found in the construction of ____________

A. A thermostat
B. An altimeter
C. A thermocouple
D. A hygrometer

Question 4810:

At constant pressure, the density of a fixed gas is ____________

A. Constant with temperature
B. Proportional to its volume
C. Inversely proportional to its temperature
D. Independent of its volume