Question # 1

A direction of torque is

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Along the position vector r

Perpendicular to both r and f

Along the direction of force F

Opposite to the direction of r

A 60 kg man in an elevator is moving upward with an acceleration of 9.8 ms-2. The apparent weight of the man.

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Increase

Decreases

Remain constant

Becomes zero

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No spark plug is needed in the

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Petrol engine

Diesel engine

Gas engine

Water engine

Angular momentum has the same unit as

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Impulse x distance

Power x time

Linear x time

work x frequency

In stationary waves the points which always remain at rest are.

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Nodes

Antinodes

Crest

Trough

Two vector can be added by simple arithmetical method when they are at an angle of.

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120^o

90^o

0^o

45^o

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

When speed of a body is doubled then its

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K.E. is doubled

P.E. is doubled

Acceleration of doubled

Momentum is doubled

First law of thermodynamics can be defined by the equation

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The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

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

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

The maximum range of projectile is 100 km, Take 9=10 ms-2, the initial velocity of the projectile will be.

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1000 kms-1

1 kms-1

10 kms-1

100 kms-1

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

Which one of the followign Muslim mathmatision determined the earths circumference.

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Al Beruni

Ibn Sina

Al Khawrizmi

None of these

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