Question # 1

An object of mass 1 kg placed at earth's surface experience a force of.

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1 N

9.8 N

100 N

Any Value

0.2 mm in units of meters is.

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2 x 10⁴ m

0.0002 m

0.002 m

None of these

The area under the speed-time graph is numerically equal to

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Distance covered

Velocity

Unifrom velocity

Acceleration

A book of mass 5 kg is placed on the table, the magnitude of net force acting on the book is.

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0 N

25 N

5 N

10 N

Which of following prefeix represents largest value.

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Pico

Peta

Mega

Kilo

Gradient of the speed-time graph is equal to.

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Speed

distance covred

Acceleration

Velocity

Volume of water consumed by you per day is estimated in.

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Cubic metre

Litre

Mililitre

Kilogram

Two rods with length 12.321vm snf 10.3 cm are placed side by side. the difference is their lengths is.

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2.02 cm

2 cm

2.021 cm

2.0 cm

Which of the following is a base unit.

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Mole

Pascal

Coulomb

meter per second

If a cyclist has acceleration of 2 m/s2 for 5 seconds, the change in velocity of they cyclist is.

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15 m/s

10 m/s

2 m/s

20 m/s

In 5 s a car accelerates so that its velocity increases by 20 m/s. The acceleration is

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0.25 m/s2

4 m/s2

100 m/s2

25 m/s2

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

The speed of sound in a liquid is …………..than that in gases:

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Ten times

Fifteen times

Five times

Two times

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

If a dielectric medium is present between two point charges them electrostatic force will be:

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Increased

Decreased

Vanishes

Remain same

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

If the distance between the charged bodies is much greater as compared to their sizes then the bodies are considered is:

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Positive charge

Negative charge

Point charge

Zero charge

That period in which voltage repeats its value in equal intervals is called:

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cycle

Time period

Frequency

Amplitude

Which animal have ability to move his eye lens:

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Snake

Fish

Ant

Tiger

The displacement produced in the spring is directly proportional to force is called:

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Hook’s law

Boyle’s law

Newton’s law

Joule’s law

The speed of sound in air at 0°C is:

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331ms^-1

376ms^-1

231ms^-1

386ms^-1

The instrument which is used to display the magnitude of changing electric current is called:

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Evacuated tube

Cathode rays oscilloscope

Television tube

Picture tube

Satellites are the objects that orbit around the

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Moon

Sun

Earth

Star

The final image formed by a simple microscope.

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Virtual and inverted

Real and erected

Virtual and erected

Real and inverted

Viscosity is represented by Greek letter

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The profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

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0.5

5

10

20

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

Polarization

In the thermodynamics process , the equation W = -delta U represents.

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Isothermal expension

Isothermal compression

Adiabatic expansion

Adiabatic compression

The SI units of solid angle is

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Streadian

Radian

Degree

None of these

The ratio of the velocities of wate in a pipe lying horizontally at two ends is 1 : 4 The ratio of diameters of pipe at these two ends is.

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1 : 2

2 : 1

1 : 4

4 : 1

Significant figures in 0.000546

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1

4

3

5

X-rays were discovered by

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Curie

Henry Becquerel

Rontgen

None of these

Ampere second stands for the unit of.

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Charge

emf

energy

Power

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

The material whose resistivity becomes zero below a certain temperature

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Conductors

Semi conductors

Super conductors

Insulators

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

The peak value of alternating current is 5√2 A. The mean square value of current will be:

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5A

2.5A

5√2A

5²

The temperature at which, semiconductor behaves as insulators:

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10k

0k

237k

None of above

Life time of metastable states is

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10^-6 sec or more

10^-3 sec or more

10^-5 sec or more

None of these

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

The open loop gain of the amplifier is order of.

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10⁶

10⁵

10⁷

10³

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