Question # 1

If the dot product of two non zero vectors vanishes the vectors will be.

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any scalar quantity

Any negative number

Its magnitude but not direction

Its magnitude and direction

Which of the following is SI base unit for temperature.

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Celsius

Kelvin

Fahrenheit

Rankine

Frequency of second pendulum is.

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0.5 Hz

1.0 Hz

1.5 Hz

2.0 Hz

If a body a moving with constant acceleration the velocity time graph will be a

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zig zag

Straight line

Constant value

zero value

A simple pendulum suspended from the celling of a lift has a time period T when the lift falls freely the time period of the pendulum will become

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Zero

T/9.8

9.8 T

Infinity

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

The product of two non zero numbers is.

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A vector quantity

A unit vector

Always zero

Never equal to zero

The moment of inertia depends upon

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Mass of the body and its radius

Mass of the body and its angular speed

Mass and angular momentum

Mass as well as the distribution w.r.t axis of rotation

The centre of gravity of an irregular shaped object lies at

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The intersection of diagonals

The intersection of medians

Its centre

The axis of rotation

Time period of a simple pendulum depends upon.

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Thickness of the thread

Mass of the pendulum

Length of the pendulum

Amplitude of vibration

Which vector gives the displacement from one point another in space.

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Null vector

Position vector

Unit vector

Distance vector

The SI unit of plane angle is

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Radian

Degree

Steradian

Radian per second

when a bowl of water is take into the bottom of a well the work done is.

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Positive

Negative

Zero

Maximum

For maximum range angle of projection of the projectile should be

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45 ^o

90^o

120 ^o

180 ^o

A physical quantity which produces rotation in a body is called.

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Force

Torque

Momentum

accelerate

The dimensions of moment of inertia are

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[ML2]

[MLT-1]

[ML2T-1]

[ML-1T-2]

Which of the following is a non conservative force.

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Gravitational force

Air resistance

Elastic force

Tension in a string

A force of 20 N is applied on an elastic spring if the extension produced in the springs to cm, the value of spring constant.

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2 Nm-1

20 N m-1

200 N m-1

2,000 N m-1

On the ground the gravitational force on a satellite is W What is the gravitational force on the satellite when at height R/50

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0.96 W

0.98 W

1.04 W

1.02 W

The acceleration due to gravity

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Has the same value everywhere in space

Has the same value every where on the earth

varix with altitude on the earth

Is great her on the moon owing to its smaller diameter

Solar cells are thin sand whishes of

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good conductors

Bad conductors

Semi conductor

Insulators

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