Question # 1

A Student claimed the diameter of a wire as 1.032 cm using vernier callipers. Upto what extent do your agree with it

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1 cm

1.0 cm

1.03 cm

1.032 cm

In the nineteenth century, physics science were divided into distine discipline.

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5

4

6

7

A body is in equilibrium when its:

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Acceleration in uniform

speed in uniform

Speed and Acceleration are uniform

Acceleration is Zero.

In prefix form, 0.000001 would be expressed as.

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0.1 mm

0.01 mm

0.001 mm

0.0001 mm

A refrigerator is based on the principles of .

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Mechanics

Electricity

Thermodynamics

Electronics

The speed of light is equal to:

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3 x 10⁵ ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10²ms^-1

Conduction on heat occur at ________ rate in materials

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Different

Same

Both A and B

None

The changing of a liquid into vapours from the surface of the liquid without heating:

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Cooling

Vaporization

Evaporation

Sublimation

Cream separater works on:

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Centrifuge principle

Centripetal force

Both

None

S.I unit of weight is:

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kg

m

N

K

The motion of a body about an axis is called.

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Random motion

Vibratory motion

Rotatory motion

Circular motion

When a body moves to and fro about a point, its motion is called:

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Random motion

Vibratory motion

Linear motion

Rotatory motion

Electroscope is used for detecting:

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Current

Charge

Voltage

Resistance

Mathematical formula of capacitance of a capacitor is:

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C = QV

C = Q/V

C = V/Q

C = V2/Q

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

Positive charge can be produced by:

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Combing in hair

Rubbing glass rod on silk

By rubbing ebonite rod on wool

By rubbing glass rod wool

The speed of sound in iron at 25 ^oC is ms^-1

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5950

5900

6950

6940

The value of acceleration is simple harmonic motion at mean position is:

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Maximum

Zero

10 N

Both a and b

The waves in which particles of the medium vibrate perpendicular to the direction of propagation of waves are called:

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Transverse waves

Longitudinal waves

Electromagnetic waves

None of these

the insulator between the plates of capacitor is called:

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dielectric

capacitance

resistivity

permittivity

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

The half life of argon nuclide Ar-40 is:

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2 x 10⁸years

2 .2x 10⁸years

2.4x 10⁸years

2.8x 10⁸years

The time period of an oscillating mass spring system is 10 second. If mass attached to spring id doubled then time period becomes.

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10 sec

20 sec

5 sec

None of these

Original source of energy for biomass is

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Earth

Star

Moon

Sun

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

Mercury is used as a thermometric substance because

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It is opaque

Does not stick to glass

Has low specific heat

All of these

The action and reaction never act on

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Same body

Two bodies

many bodies

All of these

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

Charge on an atom is:

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Positive

Negative

Neutral

None of these

1 tesla =

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1 MAm^-1

1NA^-1m

1NA^-1m^-1

None of above

Special organs called ampullae of lorenzenite are present in.

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Bats

Cats

Dogs

Sharks

Most of the electrons in the base of an NPN transistor flow:

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Out of the base lead

Into the collector

Into the emit

Into the base supply

Mutual induction play role in.

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Generator

D.C. motor

Galvanometer

Transformer

When an electron in an atom goes from a lower to higher orbit its:

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K.E increases , P.E decreases

K.E increases , P.E increases

K.E decreases , P.E increases

K.E decreases , P.E decreases

Self induction does not depend on

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Number of turns of the coil

Area of cross section of the core

Nature of material of the core

Current through inductor

Grid in cathode ray oscilloscope controls.

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Number of electron

Temperature of filament

Frequency of electron

Energy of electrons

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

Weber is the unit of

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Magnetic flux

Permeability

magnetic force

None of above

Electric power:

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Vx1

V²x1

V/1

V/1²