Question # 1

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

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F=eVB

F=e²V/B

F=e/VB

F=B²/ev

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

Pressure of a gas at constant volume is proportion to

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Total energy of gas

Average P.E to molecules

Average K.E of molecules

Total internal energy of gas

The ratio of the r.m.s value of the applied voltage to the r.m.s value of resulting a.c. is

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Impedance

Inductance

Reactance

Resistance

Centripetal acceleration is also called ______ acceleration:

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Tangential

Radial

Angular

None of them

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

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Newton's second law

Pascal's law

Carnot theorem

Second law of thermodynamics

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

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heat capacity

specific heat capacity

specific heat at constant volume

specific heat at constant pressure

When there is no relative motion between the magnet and coil, the galvanometer indicates:

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No current in circuit

An increasing current

A decreasing current

Either B or C

The information from far side of the universe are gathered by

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Radio telescope

Microscope

Telescope

Spectro scpe

To make an LED, it is impreacticable to use:

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Silicon

Gallium arsenide

Gallium arsenide phosphide

Iron

Both (B) and (C)

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

The band above the valence band is called

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high energy band

conduction band

empty band

none of them

The acceleration of a body at some particular instant is called

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Initial acceleration

Variable acceleration

Instantaneous acceleration

None of these

Whenever a covalent bond is broken in an intrinsic semi-conductor

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hole is created

an electron is created

an electron hole is generated

all of them

Charge to mass ratio (e/m) of a charge particle is also called its:

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Specific charge

Specific Force

Gyro-magnetic ratio

Magneto-mechanical ratio

The torque will be zero if the angle between r and F is

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zero

30°

45°

90°

Weightlessness experienced by the spaceship is due to

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Absence of gravity

Absence of inertia

Free fall of spaceship

All of these

By calculating the area under the velocity time graph, we can find the

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Acceleration

Velocity

Distance

None of these

Value of solar constant is

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1 kw/m²

1.4 kw/m²

1.4 w/m²

1 w/m²

The motion without consideration of its cause is studied in:

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Kinematics

Mechanics

Statics

Modern Physics

The dimensions of velocity gradient are same as that of

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Frequency

Time period

Angular accelerations

Accelerations

According to Huygen's principle, the new position of the wavefront after a time can be found by constructing a surface that touches all the

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primary wavelets

secondary wavelets

either of them

none of them

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