Question # 1

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

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F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

In case of metallic conductors, the change carries are:

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Protons

Electrons

Antiprotons

Positrons

Both (A) and (B)

When heat is removed from the system

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negative

positive

zero

any one of them

Experiments revealed that the ratio of the stress to the strain is a constant value for

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different material

all materials

a given material

all of them

If the instantaneous velocity of a body does not change. the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

Density is defined as:

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Mass per volume

Volume per mass

Mass x volume

Mass per length

Lyman series in the spectrum of hydrogen exists in the :

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Infra-red region

Visible region

Ultraviolet region

Both(A) and (B)

None of these

Radian is defined as the angle subtended at the center of a circle by an arc of:

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Length equal to its diameter

Length equal to its radius

Any length

None of these

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

The thermistors are usually made of

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Metals with low temperature coefficient of resistivity

Metals with high temperature coefficient of resistivity

Metal oxides with high temperature coefficient of resistivity

Semi conducting materials having low temperature coefficient of resistivity

The waves which propagate through the oscillations of material particles are known as:

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Mechanical waves

Electromagnetic waves

Any of them

None of them

When the deformation produced in the material becomes permanent, this type of behaviour is called

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proportionality

elasticity

plasticity

none of them

Total number of base units are

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three

five

seven

nine

Mathematically the vertical velocity component is

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V_fy = Vi cos θ - gt

V_fy = Vi cos θ + gt

V_fy = Vi sin θ - gt

V_fy = Vi sin θ + gt

The charged nucleus of an atom itself spins, it's magnetic field

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equals the field produced by orbital electrons

greater than the field produced by orbital electrons

much weaker than the field produced by orbital electrons

none of them

the equation F = ma, the mass 'm' is

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rest mass

variable mass

inertial mass

gravitational mass

In carnot cycle, there are isotherms as

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One

Two

Three

Four

If radius of droplet is halved then its terminal velocity in viscous medium

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Doubles

Becomes halved

Becomes one fourth

Becomes four times

The unit of inductance is equivalent to

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∨xs/A

∨xA/s

∨ x s/v

∨/A x s

If the vector sum of all the external forces acting on a body is zero, then the body will be in

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rotational equilibrium

translational

complete equilibrium

all of them

A collision is an elastic collision in which

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Momentum and K.E. is conserved

Momentum is conserved and K.E. is not conserved

Momentum is not conserved and K.E. is conserved

None of these

If m means mass of gases ejected per second from a rocket and v shows the change in velocity, then mv is named as:

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Force

Energy

Work

Impulse

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