Question # 1

The pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

An ideal choke (used along with fluorescent tube) would be

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A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

10⁶electrons are moving through a wire per second, the current developed is

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1.6 x 10^-19

1 A

1.6 x 10^-15A

10⁶A

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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-4

4

2

1

A wave, which transfer energy by moving away from the source of disturbance is called a

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progressive wave

travelling wave

both of them

none of them

The length of rotating vector (on a certain scale) represents the:

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Peak value of alternating quantity

RMS value of alternating quantity

Instantaneous value of alternating quantity

Either (B) or (C)

Either (A) or (B)

A car moves for half of its time at 80 km/h and rest half of time at 40 km/h, The total distance covered is 60 km. What is the average speed of the car?

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60 km/hr

80 km/hr

120 km/hr

180 km/hr

Fidelity refers to

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Reproduction of original sound

Reproduction of original image

Reproduction of music

Reproduction of a CD from original copy

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

In a heat engine, heat is supplied by the

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cold reservoir

sink

hot reservoir

none of them

A pure semiconductor has:

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An infinite resistance at 0^oC)

A finite resistance which does not depend upon temperature

A finite resistance which decreases with temperature

A finite resistance which increase with temperature

The sink in the heat engine is at

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Low temperature

High temperature

Zero temperature

None of these

Which pair includes a base unit and a derived unit

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Candela,mole

Joule,pascal

Kilogram,meter

Second Newton

If the plane polarized light is incident on the second sheet of Polaroid, no light is emitted when their axes are

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Parallel to each other

Perpendicular to each other

In between two positions

None of these

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates,Then quantity that remains unchanged is

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Charge Q

Potential V

Capacity C

Energy U

The substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

'S' is the arc length and after one revolution it becomes

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2π

2π/r

2πr

None of these

Negative and positive charge in a hollow sphere are equal in the number then flux from the surface will be

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Zero

Positive

Negative

Flux will be both negative and positive

The dimensional formula for the modulus of elasticity is same as that for:

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Stress

Strain

Velocity

Surface tension

The equation (V₁- V₂) = - (V₁- V₂) shows that relative velocities before and after the collision has the

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same magnitude and same direction

same magnitude and opposite direction

different magnitude and opposite direction

different magnitude and same direction

The time rate of change of velocity is called

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Initial velocity

Uniform velocity

Accelerations

None of these

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