Question # 1

An object is -14 cm in front of a convex mirror The image 5.8 cm behind the mirror. What is the focal length of the mirror.

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-4.1 cm

-8.2 cm

- 9.9 cm

-20 cm

Which of the following is an example of continuous spectra.

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Black body radiation spectrum

Molecular spectra

Atomic spectra

grating spectrum

X-rays spectrum may be

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Continuous spectrum

Discontinuous spectrum

Line spectrum

Continuous and line spectrum

Michelson's interferometer can b e sued to find

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Velocity of light

Velocity of sound

Wavelength of light

Wavelength of sound

Susceptance of a circuit is the reciprocal of.

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Admittance

Resistance

Reactance

Impedance

Since selenium becomes conductor in light so it is.

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Photoconductor

Photocell

Thermistor

Photodiode

What is the human body temperature in Celsius scale.

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30 oc

36. 9 oC

98. 4 oC

100 oC

Geiger counter was designed by

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Wilson

Geiger and Muller

Lawrence

Mosely

The proportion of crystalline to amorphous regions in a polymer depends on its

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Chemical composition

Molecular arrangement

Physical state

Chemical composition and molecular arrangement

Electromotive force is closely related to.

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Inductance

Magnetic flux density

Potential difference

Electric field intensity

An emitter follower has

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High input impedance and high output impedance

High input impedance and low output impedance

Low input impedance and low output impedance

Low input impedance and high output impedance

A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height.

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4.9 m

19.9 m

29.4 m

49.2 m

A spectroscope sorts out

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Atoms

Molecules

Elements

Isotopes

Simple harmonic motion may be assumed as a projection of uniform circular motion along a

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Diagonal

Hypotenuse

Radius

Diameter

The phenomenon of Brownian motion shows that

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Molecules exist and can be seen as bright dots moving about

Molecules moves about randomly at highs speeds

Smoke particles behaves as molecules

Smoke particles can be used as models of air molecues.

One light year is equal to.

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9.46 x 10¹⁵ cm

9.46 x 10¹⁵ m

9.46 x 10¹⁵ km

7.88 x 10¹⁴ m

A sound wave is an example of

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Transverse wave

longitudinal waves

Hair wave

Stationary wave

Spherical aberration can be removed by using

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Concave lens

Convex lens

By limiting the number of rays using a stopper

By using a concave convex lens

The Beta particles move along.

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Straight path

Curved path

Zig Zag path

Circular path

In an accelerated or non - inertial frame of reference the weight of the body depends upon.

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Acceleration of the frame of reference

Velocity of the body

Momentum of the body

Velocity of the frame of reference

If a wave vibrates 10 times in one second with a speed of 10 m s-1 the wavelength will be.

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1 m

10 m

20 m

100 m

Real gases obey gas laws only at

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Low pressure and high temperature

High pressure and low temperature

High pressure and high temperature

Low pressure and low temperature

Which of the following parameters does not characterize the thermodynamic state of matter.

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Temperature

Pressure

Volume

work

In heavy atims the electrons are assumed to be arranged in.

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Elliptical shells

Inner shells

Concentric shells

Outer shells

The relation between refractive index an critical angle is.

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sin C =1/n

sin n = 1/C

sin c = 1

n = sin C

The discovery of interference of light was made possible in.

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1801

1901

1825

1925

The law of gravitation was introduced by

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Huygen

Boyle

Newton

Pascal

Which gas strictly obeys gas laws.

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Hydrogen gas

Inert gas

Ideal perfect gas

Helium gas

A device used to measure the strain of an object and it is a type of resistor that changes value with applied strain is a

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thermistor

Strain gauge

Thermocouple

Potentiometer

Which of the following are sources of direct current.

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Batteries

Solare cells

Thermocouples

All of these

How many terminals does a BJT have.

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1

2

3

4

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