Question # 1

The closed loop gain of the non-inverting amplifier is given by

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G = R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

G = 1 + T₂/R₁

Aluminum is a:

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Good insulator

Bad conductor

Both (A) and (B)

Excellent conductor

Semiconductor

If one end of a rubber cord is fixed with a support and the other end is wiggled by hand, the waves generated on the card are:

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Stationary waves

Transverse waves

Both of these

None of these

dimensions are the same for:

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Work and energy

Force and weight

None of these

Both a and b

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when

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The coil is distorted

The coil is rotated

The coil is neither distorted nor rotated

Both A and B

None of these

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

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Decreases

Increases

Remains same

Zero

The third band of the colour code:

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Gives the number of zeroes

Is decimal multiplier

Gives the resistance tolerance

Gives the third digit

Both (A) and (B)

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

The nature of thermal radiation is similar to:

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Ultraviolet rays

Light rays

Both of them

None of these

When each particle of the fluid moves along a smoth path, this path is known as

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straight path

smooth path

haphazard path

steamline

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

Strength of magnetic field is measured in SI units, in:

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N

N/Am

Am/N

Nm/A

None of these

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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photo diode

light emitting diode

photo voltaic cell

none of these

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

The electrode connected with the positive terminal of the current source is called

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cathode

anode

electrolyte

position

A P-N juction or semiconductor diode cannot be used as

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A rectifier

Detector

Oscillator

An amplifier

Beta particles are

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hydrogen nuclei

helium nuclei

electrons

photons

Acceleration in a body is always produced in the direction of :

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Velocity

Weight

Force

Both B and C

A spring of constant k = 0.4 N m^-1_{is to be extended thorugh 10 cm at a place where g = 10 m sec}^-2. The mass to be suspended should be:

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4 gms

0.4 gms

40 gms

None of these

Ball pen functions on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tnesion

If a mass of 10 gm is suspended from a spring of k = 9.8 Nm^-1, then the extension will be:

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1 cm

1 m

10 mm

None of these

Biomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

Compton studied the scattering of x-rays by loosely bound electrons from:

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NaCl crystal

Graphite crystal

Zirconia

Copper crystal

None of these

Root out the conventional source of energy:

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Energy from blomass

hydroelectric energy

Geothermal energy

None of these

In an N-type silicon, which of the following statement is true

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Electrons are majority carriers and trivalent atoms are the dopants

Electrons are minority carriers and pentavalent atoms are the dopants

Holes are minority carriers and pentavalent atoms are the dopants

Holes are majority carriers and trivalent atoms are the dopants

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

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Increase

Decrease

Remain constant

None of these

The amplifier which us used to perform mathematical operations electronically is known as

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calculator

OP-AMP

computer

any one of them

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

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Remains constant

Decreases

Increases

Reduces to zero

When a body moves to and fro motion, this type of motion is called

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translatory motion

circular motion

oscillatory motion

all of them

Graph of Black body radiation is example of

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Band spectra

Continuo's spectra

Line spectra

All

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