Question # 1

In a charged capacitor the energy is stored in

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Both in positive and negative charges

Positive charges

The edges of the capacitor plates

The electric field between the plates

Which are not the elementary particles?

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Photons

Leptons

Hadrons

Quarks

None of these

The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as

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m (1 - a/g)

m (1 + a/g)

m

Zero

Magnetic effect of current is used:

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In electric motor

To detect current

To measure current

All of these

None of these

The basic circuit element in A.C. circuits are:

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Resistor and capacitor

Resistor and Inductor

Capacitor only

Both (B) and (C)

None of these

An eV is unit of:

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Potential

Energy

Work

Power

Both (B) and(C)

The electric field will be uniform

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Near a positive point charge

Near a negative point charge

Between two oppositely charged parallel metal plates

None of above

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

Light year is a unit of:

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Time

Distance

Velocity

Intensity of light

The measure of the deformation in a solid when stress is applied to its is called

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elastic constant

young's modulus

strain

elasticity

The time taken by light to travel from moon to earth is:

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80 sec

500 sec

1.802 X 10⁴sec

Aerophysics

The energy gap is insulators becomes very large and has the value

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Few electron volt (eV)

Some electron volt (eV)

Several electron volt (eV)

None of these

The rate of change of angular momentum is

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The applied force

The moment of inertia

The applied torque

Impulse

In a photocell, sodium and potassium emit electrons for:

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Visible light

Infrared light

Ultraviolet light

All of these

What is the SI unit of Tensile strain?

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Nm^-2

Jm^-2

Nm^-1

Being a number, it has no unit

Who attempted to measure the speed of light

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Gallileo

Michelson

Newton

None of these

If the error in the measurement radius of a sphere is 1% then the error in the measurement of volume will be

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8%

5%

3%

1%

The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.If the resultant is at 90° with the force of the smaller magnitude then their magnitudes are:

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3, 15

4, 14

5, 13

6, 12

The law of conservation is important in many sport like

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Diving

Gymnastics

Ice-skating

All of these

The light signals are sent from the source

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A ordinary source

A monochromatic light source

A moulticolour source

None of these

The tides are produced in the sea due to force which is

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Electromagnetic force of moon

Gravitational force of moon

Combine effect of both forces

None of these forces

Wb/m² is equal to

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Henry

Watt

Tesla

Dynes

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