Question # 1

The unit of Rydberg constant R is

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m

m3

m^-1

m-2

On what factor the internal energy of a thermodynamic system depend upon.

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History

State

Process

Surroundings

Which of the following are defects in human eye.

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Myopia

Hypermetropia

Presbyopia

All of these

When two point charges of equal magnitude and opposite sign exist very close to one another the arrangement is called.

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An electric dipole

An amperian current

A null charge

A neutral source

The energy supplied in charging a capacitor resides after the charging in.

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The magnetic field

The electric field

the battery

The moving conduction charges

What is the value of earth's magnetics fields.

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5 G

50 G

100 G

500 G

An electrical source with internal resistance's' is said to operate a lamp of resistance R what fractions of the total power is delivered to the lamp.

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R+r/R

R-r/R

R/R+r

r/R-r

For which of the following objects is the centre of mass equidistant from every point on its surface

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An unsharpened pencil

A gramophone record

An egg

A table tennis ball

Two lenses of focal length 'f' are combined the resultant focal length is

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f

2f

f/2

zero

Simple harmonic motion is a type of

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rectilinear motion

Circular motion

Rotational motion

Zig Zag motion

The specific heat of all gases increases with temperature at high temperature decreases at low temperature expectation is

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Oxygen gas

Nitrogen gas

Mono atomic gas

Dia atomic gas

An example of forced oscillation is

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the pendulum of a clock

The wind screen wiper

A plucked sonometer wire

A sonometer wire excited by a tuning fork

Which material has the highest magnetic susceptibility.

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Steel

Brass

Iron

Wood

If positive terminal of the battery is connected to n-type and negative terminal of the battery is connected to p-type then the diode is.

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Saturated

A gate

Forward biased

Revere biased

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

Which of the following is a properly of a uniform gravitational field.

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If acts equally in all directions.

Its field strength is the same at all points with in it

the gravitational potential has the same value of all points with in it

It produces zero force on a stationary test mass placed in it.

Which of the following be used for redeciding mechanical aberration is optical instruments.

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Plane mirrors

Spherical mirrors

Concave lenses

Plano convex lenses

When light emitting diode is forward biased, it emits light of the colour

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Red

Yellow

Green

All of these

In a half wave rectifier the rms value of the A.C. component of the wave is.

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Less than D.C. value

Great her than D.C. value

Equal to D.C. value

Zero

Which of the following forms of electromagnetic energy has the longest wavelength.

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Microwaves

Radio waves

Infrared waves

^{Visible light}

In the direction indicated by an electric field line.

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The electric field strength must increases

The electric field strength must decreases

The potential must remain constant

The potential must decreases

In CC configuration voltage gain is.

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Less than one

More than one

One

Zero

The base unit of temperature in SI is

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Fahrenheit

Celsius

Kelvin

Rnakine

A bodybuilders uses a chest expander with five springs it takes a force of 20 N to Pallone spring out by 15 cm how much force will be needed to extend the expander by 15 cm.

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50 N

75 N

150 N

1000 N

If an object moves with velocity of light the apparent length of the object moving the direction of motion becomes.

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Larger

Smaller

Zero

Infinity

In modulation, low frequency signal is called

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Fluctuated signal

Loaded signal

Modulated signal

Harmonic signal

What happens to the energy of a charged condenser is plate separation is increased.

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It decreases

It increases

It becomes zero

It remains unchanged

The phenomenon of beats takes place due to

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Longitudinal waves

Transverse waves

Stationary waves

Both a and b

A horizontal force of 15 N accelerates a 4 kg object rom rest along a horizontal surface at a rate of 3 m s-2 At the end of 2 s the objects momentum will be.

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12 kg m s-1

24 kg m s-1

30 kg m s-1

45 kg m s-1

Besides U ²³⁵ what else is needed for making as atomic bomb.

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Electons

Protons

Neutrons

Photons

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

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