Question # 1

If the distance is doubled between two masses. The gravitational force will decrease:

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4 times

2 times

One forth

One third

Motion of butterfly is an example of.

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Random

Circular motion

Linear motion

Vibratory motion

The maximum value of friction is:

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Kinetic friction

Static friction

Limiting friction

Dynamic friction

Relation between force and momentum is:

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ΔP/F

ΔP/t

ΔPF

None

That force which produces an acceleration of one metre per second per second in a body of one kilogram mass is called

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1 joule

1 newton

1 watt

1 ampere

The machine which use unequal masses to find the value of "g" is ________

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Free fall apparatus

Atwood machine

Pulley

None

According to Archimedes principle upthrust is equal to

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weight of displaced liquid

volume of displaced liquid

mass of displaced liquid

are of displaced liquid

A force of 10 N is making and angle of 30^owith the horizontal. Its horizontal component will bw:

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4 N

5 N

7 N

8.7 N

The quantity that depends upon the force and increases with decrease in the area on which force is acting is called

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Momentum

Pressure

Mass

Velocity

In which case it is easy for the tyre to roll over:

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Rough ground

Smooth ground

Same

None

The Mars has value of g

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25.94 m/sec2

3.73 m/sec2

1.62 m/sec2

8.87 m/sec2

If the mass of the bob of a pendulum is increased by a factor of 3, the period of the pendulum’s motion will:

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Be increased by a factor of 2

Remain the same

Be decreased by a factor of 2

Be decreased by factor of 4

The speed of sound in air at 0°C is:

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331ms^-1

376ms^-1

231ms^-1

386ms^-1

How Galvanometer is connected in circuit to detect current:

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In series

In parallel

Fixed

Variable

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

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5950

5900

6950

6940

The distance between two consecutive troughs or crests is called:

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wavelength

Frequency

Time period

None of these

How Galvanometer is connected in circuit to detect current?

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In Series

In Parallel

Fixed

Variable

The distance of the object from the mirror is represented by :

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q

p

m

F

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added:

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Increases

Decreases

Remains the same

Cannot be predicted

The mirror whose outer surface is reflecting is called:

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Concave mirror

Convex mirror

Mirror

Lens

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power.

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remains unchanged

halves

doubles

four time

D.C. motor converts.

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Mechanical energy into electrical energy

Mechanical energy into chemical energy

Electrical energy into mechanical energy

Electrical energy into chemical energy

The ideal gas law is.

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PV =NVk

P = NkT

PV =nRT

P=nRT

If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is.

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200 m

2 m

1 m

0.5 m

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

If the separation between the plates of a capacitor is doubled then its capacitance become.

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Double

Half

One fourth

Three times

Electron vibrating 94,000 times each second will produce radio waves of frequency.

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94 Hz

940 HZ

94 Hz

490 Hz

Pair production occurs only when energy of photon is at least equal in:

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1.02keV

1.02 eV

1.02 MeV

1.02 GeV

The SI unit of stress is same as that of.

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Pressure

Force

Momentum

Work

The concept of direction is purely

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Relative

Absolute

Relative to the motion

None of these

The total flux through a closed surface.

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Directly proportional to shape and geometry

Independent of medium

Depend on shape and geometry

Dependent on medium and the charge enclosed

Photo electrons are emitted y using visible light when the metal is.

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sodium

Copper

Nicked

Cobalt

The electric intensity due to two oppositely charged plates is

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None of these

Conductors have conductivities of order:

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10³(Ωm)-1

10⁷(Ωm)^-1

10⁷Ωm^-1

10^-6Ω

In three phase A.C supply coils are inclined at an angle of.

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0^o

90^o

120^o

80^o

A perfect absorber must also be perfect

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Cavity

Sources of radiation

Radiator

None of these

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