# General Knowledge - Physics

### Exercise :: Physics - Section 1

• Physics - Section 1
73.

One nanometer is equal to

 A. 10-6m B. 10-8m C. 10-9m D. 10-5m

Explanation:

No answer description available for this question. Let us discuss.

74.

Mica is used in electrical appliances such as electric iron because mica is

 A. a good conductor of heat but a bad conductor of electricity B. a bad conductor of heat but a good conductor of electricity C. a good conductor of heat as well as electricity D. a bad conductor of heat as well as electricity

Explanation:

No answer description available for this question. Let us discuss.

75.

It is easier to roll a barrel full of coal tar than to pull it because

 A. the full weight of the barrel comes into play when it is pulled B. the rolling friction is much less than the sliding friction C. more surface area of the barrel is in contact with the road when it is pulled D. coal tar is a liquid and it flows in the barrel when it is rolled

Explanation:

No answer description available for this question. Let us discuss.

76.

Minimum number of unequal vectors which can give zero resultant are

 A. two B. three C. four D. more than four

Explanation:

No answer description available for this question. Let us discuss.

77.

Intensity of sound has

 A. an object existence B. a subject existence C. no existence D. both subjective and objective existence

Explanation:

No answer description available for this question. Let us discuss.

78.

Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from

 A. east B. west C. northeast D. southeast