Physics Past Questions and Answers

In the hare's apparatus, water rises to a height of 26.5 cm in one limb. if a liquid rises to a height of 20.4 cm in the other limb, what is the relative density of the liquid?

A 0.8
B 1.1
C 1.2
D 1.3

Question 12:

When cold water is poured on a can containing hot water, the can collapses because the

A Steam condeses and occupies the partial vacuum in the can
B External air pressure counter balances the pressure within the can
C Steam expands to occupy the vacuum remaining in the can
D External pressure becomes greater than the pressure within the can.

Question 13:

An empty density bottle weighs 2 N. if its weighs 5 N when filled with water and 4 N when filled with olive oil, the relative density of olive oil is

A (1)/3
B (2)/3
C (1)/5
D (2)/5

Question 14:

The thermometric properties of a thermocouple is the change in?

A Equivalent resistance
B Electromotive force
C Colour
D Pressure

Question 15:

During summer, the balance wheel of a clock expands.what effect does this have on the accuracy of the clock?

A The clock gians time
B The accuracy of the clock is not affected
C The clock losses time
D The clock stops working