Question # 1

The equation of parabola is.

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y= bx - ax2

x = by - ay2

y = ax + bx2

x = a -by2

If an elevator is moving vertically up with an acceleration 'a' the force exerted on the floor by a passing of mass 'm' is

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Ma

Mg

M(g +a)

M (g-a)

When a vector is multiplied by a negative number its direction.

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Remains unchanged

Changes by 180 ^o

Becomes horizontal

Vertical to each other

When a body is taken out of the earth's gravitational field, the P.E. with respect to earth is

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Zero

Minimum

Maximum

geothermal

The gravitational force between two bodies does not depends upon.

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The product of their masses

Their separation

The sum of their masses

The constant of gravitation

Candela is the SI base unit of.

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illuminance

Luminous flux

Luminous intensity

Radiant energy

The are between the velocity time graph and the time axis is numerically equal to.

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Distance moved by the object

Speed of the object

Velocity of the object

Acceleration of the object

A bomb dropped from an aeroplane explodes in air, its total.

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Momentum decreases

Momentum increases

K.E. Increases

K.E. Decreases

Acceleration due to gravity is not affected by which one of the following

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Latitude

Attitude

Longitude

Depth

Which quantity has dimensions different from the others.

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Energy per unit volume

Force per unit area

Angular momentum per unit mass

Pressure

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

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

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Null vector

Position vector

Unit vector

Distance vector

Which example best illustrates the conservation of electrical energy to chemical energy.

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Starting a car

Generating hydroelectric power

Changing an accumulator

Melting a fuse

The graph between restoring force and time in SHM is a

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Straight line

Parabola

Sine wave

Circle

The resultant magnitude of two vectors

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Is always positive

Can never be zero

Can be negative positive or zero

Is usually zero

Inertial mass and gravitational mass are

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Opposite

Proportional

Weights

Inversely proportional

A force passing through the centre of gravity of a body

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Causes its translational motion

Causes its rotational motion

Holds the body in equilibrium

Produces both translational and rotational motion.

A body is said to be in translations equilibrium, only if the vector sum of all the forces acting on it becomes.

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Double

Zero

Maximum

Quadruples

If a force 5 N applied parallel to a moment arm 5 m then torque will be

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0 N m

5 N m

10 N m

25 Nm

Which of the following quantities has a unit that can be expressed in terms of just two different SI Units.

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Area

Charge

Force

Current

In simple harmonic motion it is found that the total energy of a system.

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Is independent of the amplitude

Depends on the amplitude squared

Is independent of the mass

All of these

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