Question # 1

Which one is a good conductor?

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cotton

air

wool

iron

The ability of a body to do work is known as

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power

energy

kinetic energy

potential energy

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

Hydraulic press is a machine which works on:

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Hook's law

Pascal's law

Boyle's law

Archimedes principle

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

The value of gravitational constant is SI unit is

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0.673 x 10-10

6.673 x 10-11

4.32 x 10-9

5.32 x 10-11

When the cyclist stop pedalling, bicycle stops due to :

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Friction

Momentum

Weight

Mass

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

Formula of Power:

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P = wt

P = w/t

P = t/w

P = w/t²

If the direction of motion of the force is perpendicular to the direction of motion of the body then work done will be:

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Maximum

Minimum

Zero

None of these

SI unit of pressure is pascal, which is equal to

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104 Nm-2

1 Nm-2

102 Nm-2

103 Nm-2

The resistance of voltmeter is:

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zero

low

Very high

10Ω

1 nano farad is equal to:

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1 x 10^-12 F

1 x 10⁹F

1 x 10^-9F

1 x 10^-6F

The oscillations of a system in the presence of _____________ force are called amp oscillations:

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Resistive force

Attractive force

Both of these

None of these

Typographical errors in BASIC statements are:

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Runtime errors

Logical Errors

Syntax errors

Execution errros

When resistances are connected in series the current passing through them is:

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Different

Zero

The same

None of these

The frequency of silent whistle is:

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20,000 Hz - 25000 Hz

2000 Hz - 25000 Hz

200 Hz - 2000 Hz

25000 Hz

Which type of image is produced by the converging lens of human eye if it views a distant object:

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Real, erect, same size

Real, inverted, diminished

Virtual, erect, diminished

Virtual, inverted, magnified

The line which passes through pole of the mirror and center of curvature is called principal:

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axis

Focus

Line

None of these

The product of frequency and time period is equal to:

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v

0

1

L

Intensity level of the sound produced by mosquito buzzing is:

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70 dB

40 dB

10 dB

120 dB

As the temperature of a conductor rises, its resistance.

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Increase

Decrease

Does not change

None of these

Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will

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Decrease

Unchanged

Half

Increases

Using a graded Index fibre, the time difference is reduced to about.

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1 ns per km

33 ns per 100 km

33 ns per km

1 ns per 100 km

The relation between linear and angular velocity is

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The device used for measurement of liquid flow is.

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Manometer

Barometer

Hydrometer

Venturimeter

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

Information carrying capacity of optical fibre called.

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Capacity

Band width

Immunity

Ability

If amplitude of a simple pendulum is increased by 4 times the time period will be.

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Four times

Half

Same

Two times

Which one is non renewable source of energy.

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Hydro electric

Bio mass

Tides

Oil

A body rotating with angular velocity of 2 radian/s and linear velocity is also 2 ms-1, then radius of circle is.

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1 m

0.5 m

4 m

2 m

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

Useful device to measure resistance, current and voltage is an electronic instrument called.

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Volt meter

Ammeter

Ohmmeter

Digital Multimeter

A semiconductor in its extremely pure form is known as:

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Intrinsic

Extrinsic

Both a and b

None of above

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

The magnitude of motional emf is given by

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Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

Which is not characteristic of Laser.

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Monochromatic

Coherent

Intense

Multi direction

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

If D.C. input for step up transformer, the output is

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Zero

High

Low

May be high or low

Mutual induction has a practical role in the performance of the.

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Radio choke

Transformers

A.C. Generator

D.C. Generator