Question # 1

The R₁= infinity and R₂= 0, then the gain of non-inverting amplifier is

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zero

infinity

one

any one of these

All trigonometric functions (sine, cosine, tangent etc) are positive in:

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

The path described by a projectile is called its

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orbit

trajectory

range

distance

An induced current can be produced by

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Constant magnetic field

Changing magnetic field

Varying electric field

Constant electric field

None of these

The conduction band in a solid

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may be empty

cannot be empty

should be filed

all of them

In an interference pattern of Young's double slit(YDS) experiment:

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Bright fringesare wider than dark fringes

Dark fringes are wider than bright fringes

Both dark and bright fringes are of equal width

Central fringes are wider than the outer fringes

In a semi-conductor material, the total current is

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only the +ve current

only the electronic current

sum of +ve and electronic current

all of them

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

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21 x 10³+ 10%

23 x 10¹+ 10%

21 x 10³+ 5%

12 x 10³+ 5%

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

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N = nN_Am = MN_A

n = N N_A, M = mN_A

M = N_A/N , N_A= m/n

N = nN_A, M = mN_A

The force applied on unit area to produce any change in the shape, volume or length of a body is known as

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strain

elasticity

stretching

stress

The unit of spring constant is

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J-sec

Metre

Nm^-1

None of these

An electric fan rotating in 3 revs^-1 is switched off. It come sot rest in 18.0 sec. Find the value of acceleration which is

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+ 1.267 revs^-2

0027 revs^-2

- 0.167 revs^-2

- 0.152 revs^-2

The distance between the top adjacent slits on diffraction grating is called

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element

grating element

aperture

slit

The dimensional formula of angular velocity is:

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M^°L^°T^-1

MLT^-1

M^°L^°T^-1

At the point of contact of the lens and the glass plate, the incident and reflected rays interfere

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constructively

destructively

either of them

none of them

When the fuel ignited it turns to a gas at

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Low pressure

High pressure

Extremely high pressure

None of these

A thin film is a transparent medium whose thickness is comparable with the wavelength of

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light

sound

any one of them

none of them

The atmosphere is held to the earth by

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Winds

Gravity

Clouds

The rotation of earth

Newton's second law of motion is also called

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Law of inertia

Law of acceleration

Law of force

None of these

Gaussian surface may be

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Spherical

Rectangular

Any shape

None of these

In YDS experiment, fringe spacing means the distance between two consecutive_____fringes:

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Bright

Dark

Any of A or B

None of these

A wire of 100 mm length and 1 mm²surface area stretches 10 mm under a load of 60 N. A second wire of same material, with half the diameter of the first wire is stretched by the same load. What is the extension in the second wire?

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20 mm

30 mm

40 mm

50 mm

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