Question # 1

When using the formula E = h lambda what unit should energy have.

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Joule

Watt second

Newton metre

Electron volt

When light of particular frequency is allowed to fall upon a metal surface electrons are emitted from a these emitted electrons are called.

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Photons

Holes

Quants

Photo electrons

In electromagnetic spectrum X-rays are next to.

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Water waves

Radio waves

ultraviolet waves

Infrared waves

The mass of an helium nucleus is equal to.

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2.0015 u

3.0015 u

4.0015 u

5.0015 u

White light a tungsten filament lamp is passed through sodium vapor and viewed through a diffraction gritting Which of the following best describes the spectrum which would be seen.

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Coloured lines on a black background

Coloured lines on a white background

Dark lines on a coloured background

Dark lines on a white background

x-rays cannot produce

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Photoelectron

Compton electron

Electron positron pair

All of these

Work function is generally expressed in.

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Electron volt

Joules

Newtons

Gauss

The back ground radiation in the atmosphere on the average is

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0.5 Sv per year

1.0 Sv per year

1.5 Sv per year

2.0 Sv per year

A CE amplifier with by passed emitter resistor is an example of.

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Current series feedback

Voltage sires feed back

Current shunt feedback

Voltage shunt feed back

Which of the following is required for maintaining sustained chain reaction.

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Neutrons

Protons

Electrons

Photons

The bunding energy per nucleon for iron is.

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zero

Maximum

Negative

Minimum

The resistance between(+) and (-) inputs of an amplifier is.

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Zero

Low

High

Infinity

Usually in an operational amplifier the inputs used are of

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Equal voltage and same polarity

Equal voltage and opposite polarity

Different voltage and same polarity

Different voltage and opposite polarity

Which of the following is invariant under Galilean transformation.

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Velocity

Impulse

Momentum

Distance

Mass -energy relation means that the product of mass times the square of the speed of light must be equal to.

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Torque

Momentum

Energy

Impulse

Which of the following is the most commonly used regions of operations for a transistor.

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Cut off

Saturation

Active

All of these

Which animal did Erwin Schrodinger contemplate using in his famous thought experiment.

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mouse

Cat

Dog

Rabbit

An operational amplifiers will act as an inverting amplifier when the input signal is connected to.

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Inverting terminal

Non inverting terminal

Earthened wire

Both a and b

One radian is equal to.

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0.1 Gy

0.01 Gy

0.001 Gy

0.0001 gy

Critical mass is the minimum mass needed for

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Fusion

H-Bomb

Chain reaction

Binding energy

Which of the following is believed to be carrier o nuclear forces.

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Lepton

Meson

Bason

Baryon

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