Question # 1

Stoke;s law is not applicable when the speed of the object moving through a fluid is:

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Zero

Small

Large

None of these

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

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Fringe width will decrease

Fringe width will increase

Fringe width will remain unchanged

Fringe will become less intense

The useful unit of the angular displacement in SI unit is:

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Degree

Revolution

Radian

Metre

Physicist George Simon ohm was a

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German physical

French physicist

Chinese physicist

Russian physicist

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

The current produced by moving a loop of wire across a magnetic field is called

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Direct current

Magnetic current

Alternating current

Induced current

None of these

When the shear stress and shear stain are involved, then their ratio is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

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Increase k time

Decreases k times

Decreases 1/K times

Remains unchanged

Due to relative motion of observer and the frame of reference of events, time always:

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Dilates itself

Contracts itself

Stretches itself

Both (A) and (C)

None of these

A 220 V, 50 Hz. A.C. source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit?

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10 A

5 A

33.3 A

3.33 A

When resistance of a current carrying wire increases due to rise in temperature, the drift velocity of electrons:

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Decreases

Increases

Remains the constant

Either of these

None of these

The instantaneous velocity is define as the limiting value ofΔd/Δtwhen the time intervalΔt approaches to

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zero

maximum

minimum

infinity

Geothermal energy can be obtained from the heating rocks by the

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Igneous rocks

High temperature water

Decay of radioactive element

All of these

Which of the following statements for an object in equilibrium not true?

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The object must be at rest

The object can be at rest

The object is moving at constant

The acceleration of the object is zero

The efficiency of half wave rectifier is:

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25.6%

1.2%

40.6%

66.6%

Computer chips are made from

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Conductors

Semiconductors

Insulators

Both A and B

In the absence of any force acting on a body

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its momentum changes with distance

its momentum is conserved

its momentum is not conserved

its momentum changes with time

The SI unit of power is terms of base unit is

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Watt

Kgm²s^-3

Kgm^-2s^-3

Kgm²s³

In colour printing, the entire range of colours uses just

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Three colours

Four colours

Five colours

None of these

An ECG records the electric process in heart between

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Points on human skin

Two limbs of human foot

Two lungs of human

None of these

The amplitude of oscillation of each atom in a metallic crystal rises with the

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rise in temperature

decrease in temperature

even temperature remains constant

all of them

In a semi-conductor material, the total current is

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only the +ve current

only the electronic current

sum of +ve and electronic current

all of them

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