Question # 1

The word science means.

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Intelligence

Nature

Knowledge

Philosphy

The rate at which various surface absorb heat depends upon:

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Nature of surface

Nature of liquid

Radiation

Emission & absorption

Rooms are heated using gas heater by:

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Conduction only

Convection and radiation

Radiation only

Convection only

In symbols, co-efficient of volume expansion is defined as

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β = ΔT/V∘ΔV

β = ΔV/ΔT

β = ΔV/V∘ΔT

β = ΔT/ΔV

Radiation are emited by:

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Cold body

Hot body

All bodies

None

The work is negative if the angle between force and displacement is:

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0°

45°

90°

180°

Fossils fuels are usually compound of:

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Carbon

Hydrogen

Carbon & Hydrogen

None of these

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

__________ is a major source of heat:

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Mercury

Sun

Fire

Moon

Science is that word which is derived by Latin word.

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Scient

Scientis

Scientia

Sciincet

Clockwise torque is taken:

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Positive

Negative

Neutral

Nil

A capacitor stores 0.24 coulombs at 10 volts. It capacitance is:

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0.024F

0.12F

0.6F

0.8F

The presence of fish by the other fish can be detected by:

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Magnetic field

Electric field

Gravitational field

All of above

In there is no extension in the spring then this positon is called

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Equilibrium position

Unequilibrium

Nautral equilibrium

Stable equilibrium

electric intensity is a quantity:

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scalar

vector

base

none of these

In case of OR and AND operation, if switches s₁ and s₂ both are open then lamp is:

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On

Off

Sometimes on and sometimes off

Neither on nor off

An electric current in conductors is due to the flow of:

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Positive ions

Negtive ions

Positive charge

free electron

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 2

Remain the same

Be decreased by a factor of 2

Be decresaed by a facro of 4

Mice can hear frequencies upto:

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100, 000 Hz

25.000 Hz

120,000 Hz

1,000 Hz

In C.R.O grid is always connected with potential:

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Negative

Positive

High positive

Zero positive

In electrostatic all charges are in:

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The same direction

Opposite direction

Motion

Static state

Which we double the voltage in a simple electric circuit. We double the

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Current

Power

Resistance

both a and b

Two waves of same frequency and moving in the same direction produces.

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Interference

Diffraction

Beats

Stationary waves

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

Which is the example of vector quantity

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Torque

Speed

Density

Work

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

A wheel of radius 50 cm having an angular speed of a rad /s have linear speed.

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1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

the length of simple pendulum of time period 1 second is

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2 m

1 m

0.5

0.25 m

If velocity time graph is parallel to time axis, then acceleration of moving body will be.

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Maximum

Positive

Zero

Negative

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

Change of momentum is equal to

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Force

Tension

Impulse

Pressure

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

Average value of current and voltage over a complete cycle is.

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Positive

Negative

Zero

Infinite

The highest value reached by the voltage or current is one cycle is called:

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Peak to peak value

Peak value

Instantaneous value

Root mean square value

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

Production of x rays is reverse process of

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Photo electric effect

Compton effect

An nihilation

Pair production

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

In case of inductor , energy is stored in the

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Electric field

Magnetic field

Potential field

Gravitational field

Wave nature of particle was given by:

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Clemensen

Louis de Broglie

Laster H. Germer

Clinton S. Davisson

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66