Question # 1

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

The tides raise in the sea roughly

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Once a day

Twice a day

Three a day

Four time a day

The flow of a fluid is of

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One type

Two types

Three types

Four type

The efficiency of heat engine whose sink is at 17 ^oC and source at 200 ^oC is.

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38%

63%

80%

90%

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

The magnitude of A will be

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Zero

A²

1

A

the angular version of F= ma is

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L = 1w

pi = 1a

l = pi a

f = mv/t

Force 12 N and 5 N are add, the resultant con not be

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13 N

6 N

7 N

17 N

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

The optical fibre is covered for protection by

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Glass jacket

Plastic jacket

Steel jacket

Diamond jacket

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

The speed \velocity of sound is greatest in.

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Air

Steel

Ammonia

Water

For a diatomic gas Cv= 5R/2 then gamma for this gas is.

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5/7

4/35

7/5

35/4

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11th Class Part 1 Physics Test Online MCQs With Answers

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