Question # 1

The minimum value of charge on any object is.

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1.6 x 10^-29 C

1.6 x 10^-19 C

1.6 x 10^-9 C

1 C

A positive and a Negative charge are initially 4 cm apart When they are moved closer together so that they are now only 1 cm part the force between them is.

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4 times smaller than befor

4 times larger than before

8 times larger than before

16 times larger than before

The value of critical angle of glass is

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45^o

42^o

48^o

52^o

Which statement for geostationary orbit is false.

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A geostationary orbit must be directly above the equator

All satellites in a geostationary orbit must have the same mass

The period of a geostationary orbit must be 24 hours

There is only one possible radius for geostationary orbit

The first artificially produced nuclear transmutation was accomplished by.

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Curie

Rutherford

Becquerel

Chadwick

Young's double slit experiment was performed in

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1801

1916

1901

1934

In which given process does the system always return to the original thermodynamic state.

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Cyclic

Adiabatic

isothermal

Isobaric

If a di electric is placed between the plates of a capacitor, its capacitance.

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Decreases

Increases

Remains unaffected

Is zero

Photocells are used for

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Security systems

Counting systems

Automatic door system

All of the above

The half life of a radioactive substance depend on.

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Pressure

Temperature

Amount of substance

No external influences

The two elements with same number of electrons but different mass number are called.

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Isotones

Isobars

Isotopes

Isomers

What is term for tendency of a system to oscillate with larger amplitude at some frequencies than at others.

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Resonance

Impedance

Inductance

Capacitance

The loudness of a sound depends on its

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Wavelength

Frequency

Wave amplitude

Regularity

Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field.

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Curie's law

Voltmeter

Ammeter

Wattmeter

The ideal thermal efficiency of a cyclic heat engine is limited by

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Friction in the engine

Amount of heat in the engine

Difference between input temperature and output temperature.

Amount of work

halls fall faster than rain drops due to their

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Grater size

Greater mass

Greater area

Structure

Which of the following is a clinical thermometer.

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Gas thermometer

Mercury thermometer

Alcohol thermometer

Radiation thermometer

In vacuum all electromagnetic waves have the same.

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Frequency

Amplitude

Speed

Wavelength

A wave reflected from the boundary of a denser medium will have phase change

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45 ^o

60^o

90 ^o

180 ^o

Which force pushes up a body in fluid

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Thrust

Lift

buoyant

Pressure

The SI unit of spring constant is identical with that of.

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Force

Pressure

Surface tension

Loudness

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

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Positive ion

Negative ion

Positive charges

Free electrons

Laser light is considered to be coherent because it consists of.

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Many wavelengths

Uncoordinated wavelengths

Coordinated waves of exactly the same wavelength

Divergent beams

A force of 10 N is acting along z-axis, its component along x -axis and y-axis is

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2 N , 8 N

3 N, 7 N

5 N each

Zero

An inflated tyre suddenly bursts As a result of this temperature of the surrounding

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Increases

Descreases

Remains constant

May increase or decrease

Which quantity has different units from the other three.

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Density x volume x velocity

Rate of change of momentum

Young's modulus x area

Weight

The ratio of the magnitude of charge on one of the two conductors in proximity to the potential difference between the two is called.

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Inductance

Reactance

Resistance

Capacitance

Which of the following thermometers is the most suitable for measuring rapidly varying temperature.

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Thermocouple thermometer

Mercury in glass thermometer

Alcohol in glass thermometer

Platinum resistance thermometer

The rectangular coil in galvanometer is made up of.

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Bare copper wire

Insulated aluminum wire

Enameled copper wire

Enameled steel wire

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

A disturbance that travels through space and time usually accompanied by energy transfer is called.

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sound

Wave

Echo

Frequency

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