Question # 1

The closed loop gain of the inverting amplifier is written as

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G = R₂/R₁

G = 1 + R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

An oscillating body oscillates due to:

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Applied force

Restoring force

Frictional force

None of these

The angle between centripetal force and displacement of the body moving in a circle is:

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0°

90°

180°

None of these

An L-R circuit has R = 10 Ω and L = 2 H. If 120 V, 60 Hz A.C. voltage is applied, then current in the circuit will be

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0.32 A

0.16 A

0.48 A

0.80 A

Which one of the following is dimensionless:

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Acceleration

Velocity

Density

Angle

Motional emf is called motional:

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Electromagnetic force and is measured in newtons

Electromotive force and is measured in volt

Electromotive force and is measured in newtons

Electromagnetic force and is measured in volts

None of these

Ultra-violet rays differ from X-rays in that they

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Cannot be diffracted

Cannot be polarized

Have a lower frequency

Are deviated when they pass through a magnetic field

If an iron ball and a wooden ball of the same radius was released from a height 'h' in vacuum, then time taken by both of them to reach ground will be

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Unequal

Exactly equal

Roughly equal

Zero

If the acceleration of a body is negative, then slope of the velocity-time graph will be:

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Zero

Positive

Negative

Infinity

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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Is smaller than

Is greater than

Becomes equal to

None of these

In AND gate, the output is 1 if:

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Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

Two equal, antiparallel and non-collinear forces are called

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Net force

Couple

Torque

None of these

Can the resultant of 2 vectors be 0?

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Yes when the 2 vectors are same in magnitude and direction

No

Yes when the 2 vectors are same in magnitude but opposite in sense

Yes when the 2 vectors are same in magnitude making an angle of 2π/3 with each other.

In Young s experiment the distance between two adjacent fringes for blue light is than that for green light

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Lesser

Greater

Equal

Lesser if distance between source and screen is large

Ratio of dimensions of power and K.E is

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1 : 1

T : 1

1 : T

M : T

A Celsius degree is larger than a Fahrenheit degree by

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5/9

9/5

9/10

9/8

If the focal length of objective is 10 mm find its magnification

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18

19

20

21

A polarizer is used to

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Reduced intensity of light

Produce polarized light

Increase intensity of light

Produce unpolarised light

Identify the vector quantity

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Heat

Angular momentum

Time

Work

The rightward forces acting on a body in equilibrium are taken as

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negative

positive

either negative or positive

none of them

The power output of a full wave rectifier is:

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Equal to H.W.R

Twice of H.W.R

Half of H.W.R

Four times of H.W.R

Two row boats moving parallel in the same direction and pulled toward each other due to the application of Bernoulli's equation

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Stake's theorem

Toricelli's theorem

Venturi relation

None of these

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