Question # 1

A square loop of wire is moving through a uniform magnetic field. The normal to the loop is oriented parallel to the magnetic field. The emf induced in the loop is:

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Zero

Of smaller magnitude

Of larger magnitude

Sometimes B, sometimes C

Neither of these

The smooth or steady streamline flow is known as

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laminar flow

turbulent flow

both of them

none of them

In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

The dimension of linear inertia is:

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MLT²

ML⁰T^-2

ML⁰T⁰

MLT^-1

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

The smallest three dimensional basic structure in a crystalline solid is called

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lattice point

crystal lattice

cubic crystal

unit cell

The A.M. transmission frequency range from

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500-1000 KHz

540-1600 KHz

300-490 KHz

900-2040 KHz

The surface destiny of charge is defined is:

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Charge per volume

Mass per volume

Charge per area

Mass per area

Both (B) and (C)

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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Remains constant

Decreases

Increases to infinity

Reduced to zero

Scalar product is also called:

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Cross product

Dot product

Product scalar

Product vector

The locus of all points in a medium having same phase of vibration is called:

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Crest

Trough

Wavelength

Wavefront

A gas at 250K is contained ion a closed vessel. If its temperature increases by 1K, the percentage increase in its pressure is

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0.4%

0.6%

0.8%

1.0%

In case of point source of light, shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

SI unit for moment arm is

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Nm^-2

Nm

Kg ms²

None of them

Smaller the least count of the instrument more is the measurement

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Accurate

Precise

Accurate and precise

None of these

In Newton's rings the thickness of air film at the point of contact is

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maximum

minimum

equal to wavelength

zero

The unit of power is

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Erg

KW

Watt

both B and C

Photo phone was invented by

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Edison

Graham Bell

Bardeen

None of these

Propagation of light in an optical fibre requires that the light should

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be partially confined within the fibre

be totally confined within the fibre

not be confined within the table

none of them

For a body moving with constant speed in a horizontal circle,which of the following remains constant?

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Velocity

Centripetal force

Acceleration

Kinetic energy

If the bright fringe into be observed then we have relation

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Y = mLd/λ

Y = mλL/d

Y = λd/mL

Y = λL/md

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