Question # 1

In an ideal gas, the molecules have:

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Kinetic energy only

Potential energy only

Both KE and PE

None of these

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

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1310 W

670 W

810 W

1210 W

If force and displacement are in opposite direction, the work done is taken as

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Positive work

Negative work

Zero work

Infinite work

Inertial frame of references are those frame of references which are moving with

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increasing velocity

decreasing velocity

constant velocity

all of them

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

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Maximum

Minimum

Zero

Very small

None of these

Work done on a body by gravity in lifting it up to certain height is

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Maximum

Minimum

Zero

Negative

The angle which specifies the instantaneous value of the alternating voltage or current is called

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phase

critical angle

angle of incidence

all of these

The solids are classified as:

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Metals

Crystalline

Amorphous

Polymeric

All except (A)

Faraday's law of electromagnetic induction has been used in the construction of:

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Galvanometer

Voltmeter

Electric motor

Electric genrator

Commutator

A device which converts Electrical energy into mechanical energy is called as

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Transformer

Generator

Motor

All of these

The product of induced current and the resistance of the wire through which the current is passing is called:

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Electromagnetic induction

induced emf

Induced current

Self induced

None of these

The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be

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500 m

500 nm

500 km

500 cm

None of these

In magnet-coil experiment, emf can be produced by

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Keeping the coil stationary and moving the magnet

Keeping the magnet stationary and moving

Relative motion of the loop and magnet

Any one of above

All above

A.C. can be measure with the help of

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Nuclear effect

Magnetic effect

Chemical effect

Heating effect

Glass and high carbon steel are the examples of

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brittle substances

ductile substances

plastic substances

elastic substances

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

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Zero

10.2 J

100 J

980 J

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

The ratio of linear stress/linear strain is called as

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Yong's modulus

Bulk modulus

Shear modulus

Modulus

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

A shunt resistance parallel to the galvanometer is used to convert it into

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avometer

millimeter

voltmeter

none of these

Work done by the force of friction is always

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Positive

Zero

Negative

Maximum

Radioactivity is

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self disruptive activity

spontaneous activity

exhibited by all elements under proper conditions

both 'a' and 'b'

When a fluid is in motion, its flow can be considered as

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turbulent

streamline

either or them

neither of them

Referring to above figure, current in coil P falls from its maximum value to zero:

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

When switch is kept closed

None of these

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

The waves moving from a sitar to a listener in air are

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Longitudinal progressive

Longitudinal stationary

Transverse progressive

Transverse stationary

The waves produced in a microwave oven have wavelength.

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12 mm

12 cm

12 m

12 mm

The appearance of the colour in the soap (oil) film results from:

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Dispersion

Interference

Reflection

Refraction

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the:

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Force

Density

Work done

Pressure

The phenomenon of generation of induced emf is called:

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Electrostatic induced

Magnetic induced

Electromagnetic induced

Electric induced

Both A and C

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

The vertical and horizontal range will be equal id angle of projection is

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76°

45°

60°

120°

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