Question # 1

Work done is lowering the bucket into the well is:

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Zero

Positive

Negative

None of these

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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Protactinium

Actinium

Uranium

Radium

Redon

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

A fuse wire is having 5 ampere current rating. What is the peak value of current it can have?

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0.7074 A

7.07 A

0.0707 A

7.707 A

According to kinetic theory of gases, molecules of a gas behave like

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Inelastic spheres

Perfectly elastic rigid sphere

Perfectly elastic non-rigid spheres

Inelastic non-rigid spheres

Wave disturbances may also come in a concentrated bundle, like shock wave from an aeroplane flying at

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subsonic speed

sonic speed

super sonic speed

any one of them

When a mass 'm' is pulled slowly, the spring stretches by an amount x₀,then the average force would be

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F= Kx₀

F=1/2Kx₀

F=2Kx₀

F=4Kx₀

Tick the conservation force:

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Tension in a string

Air resistance string

Elastic spring force

Frictional force

Cosine of an angle is positive in:

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2nd quadrant

3rd quadrant

4th quadrant

All 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

Thermocouple is an arrangement of two different metals

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To convert heat energy in to electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electric energy in to heat energy

The product of force and time is called

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Momentum

Force

Impulse

None of these

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1.02 x 10^-3ms^-1

0.12 x 10^-3ms^-1

1.1 ms^-1

1.21 ms^-1

One angstrom equal:

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10^-8m

10^-9m

10^-10m

10^-11m

The law of conservation of momentum says that the total angular momentum of the system remains constant if no external

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Force acts on it

Torque acts on it

Frictional force action it

None of these

Which of the following lists of physical quantities consists only of vectors:

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Time,temperature,velocity

Force,volume,momentum

Velocity,acceleration,mass

Force,acceleration,velocity

By convention, the torques are taken as negative if they are in the

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downward direction

leftward direction

clockwise direction

anticlockwise direction

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

Gravitation is the property of matter which is

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External

Internal

Intrinsic

None of these

When two surface are coated with a lubricant,then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

Plasma physics is the branch of physics deals with the

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Atoms

Molecules

lons

None of these

Nicrom wire is an example of

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Non ohmic device

Ohmic device

Neutral device

Charged device

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