Question # 1

Zirconia is classified as:

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Ceramic solid

Ionic compound

Metal

Either (A) or (B)

Either (B) or (C)

Work done along a closed path in a gravitational field is:

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Maximum

Minimum

Zero

Unity

The resistance of an incandescent lamp is

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Smaller when switched on

Greater when switched off

The same whether it is switch off or switch on

Greater when switched on

Electron gun consist of

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three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

The energy stored in a charge capacitor

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1/2CV²

1/2C²V

1/2C/V²

None of these

The vector in space has:

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One component

Two components

Three components

None of these

The vibrations of factory floor caused by the running of heavy machinery is an example of

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free vibration

natural vibrations

forced vibrations

all of them

The results of mechanical tests are usually expressed in terms of

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stress

strain

stress and strain

neither strees nor strain

A field free region is found:

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Near the outer surface of a hollow charged metal sphere

In the interior of solid metal uncharged sphere

In the interior of solid metal charged sphere

Both (A) and (B)

Both (A) and (C)

Unit of viscosity is:

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Kg m^-1sec^-1

N s m^-2

J s m^-3

All of these

Ultraviolet region lies in ______ series

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Layman

Balmer

P fund

B racket

Torque is also called:

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Momentum

Linear inertia

Moment of a force

Mass

When a conductoris moved across a magnetic field:

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Emf induced its similar to that of a battery

Emf induced gives rise to induced current

An emf is induced across its ends

All are correct

None of these

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

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zero

small

large

very large

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

Which of the following theory completely explain the three types of materials

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Bohr model of electron distribution

Rutherford atomic model

Pauli's exclusion principle

energy band theory

To turn the transistor OFF, the base current is set:

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At maximum value

At zero

Either (A) or (B)

All are correct

None of correct

The current produced by moving a loop of wire across a magnetic field is called

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Direct current

Magnetic current

Alternating current

Induced current

None of these

What must be changing when a body is accelerating uniformly?

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the force acting on a body

the velocity of the body

the mass of the body

the speed of the body

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

The horizontal range of projectile, at a certain place, depends upon

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the mass of the projectile

velocity of projection

angle of projection

angle as well as velocity of projection

Kirchhoff's first rule is also called:

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Loop rule

Thumb rule

Point rule

Right hand rule

None of these

A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:

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1 m

5 m

10 m

15 m

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

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Minimum work

Maximum work

Zero work

Negative work

Aerodynamics is a branch of

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Hydrodynamics

Thermodynamics

Both of them

Statics

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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adiabatically

isothermally

isochorically

isobarically

When a nucleus emits an alpha particles, its charge number decreases by

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3

2

6

5

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

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parallel to the field

Perpendicular to the field

At an angle of 45 to the field

None of the above

The value of resistivity is the least for:

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Copper

Aluminimum

Silver

Tungsten

Iron

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

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Positive work

Negative work

Zero work

Infinte work

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