Question # 1

Energy stored in the spring of a watch is called

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Potential energy

Kinetic energy

Nuclear energy

Elastic potential

The work done moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body `

Power

.Depletion region contains:

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Protons

Positive ions

Negative ions

Both (B) and (C)

Both (A) and (C)

The value of the input resistance of OP-AMP is of the order of

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few ohms

few hundred ohms

several kilo ohms

several maga ohms

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

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Increase

Decrease

Remain constant

None of these

We can express the work in term of

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directly measurable variables

indirectly measurable variables

either of them

both of them

A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds

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25 m

20 m

50 m

9.8 m

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

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kg

kg-meter

kg/meter

Meter/kg

If the velocity time graph is a straight line parallel to time-axis, then it means that:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of above

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

Substances that flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

A ______ lens is used in the apparatus to get Newton,s rings

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Plano-concave

Plano-convex

Convexo-concave

Double convex

In uniform circular motion the angular acceleration vector is

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Constant in magnitude and direction both

Constant in magnitude only

Constant in direction only

Varies in magnitude and direction both

For the normal setting of a telescope

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Only the object is at infinity

Only the final image is at infinity

Both the object and the final image is at infinity

Neither the object nor the final image has to be at infinity

2π radian is equal to the degrees

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180^o

90^o

360^o

None of these

The polarized can be achieved by using process like

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Coherent sources

Diffraction

Selective absorption

None of these

A car travels due east on a level road for 3 km. it then turns the North at an intersection and travels 4 km before stopping.The magnitude of the resultant displacement of car is

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5 km

7 km

1 km

11 cm

Radian is an angle which is

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Solid angle

Plane angle

Angle

None of these

Electromagnetic waves from a source were found to be significantly diffracted when passing through gaps of the order of 10 m. What type of waves are they likely to be?

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gamma waves

light waves

microwaves

radiowaves

A bullet is shot from a rifle.As a result the rifle recoils The kinetic energy of rifle as compared to that of bullet is

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Less

Greater

Equal

Cannot be concluded

Material with smaller hystersis loop area are best for the construction of

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Transformer

Core of transformer

D.C motor

Rectifier

In a semi-conductor material, current flows due to

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positive charge

negative charge

both of them

none of them

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