Question # 1

What is the voltage a 6 Mega resistor when 3 A of current passes through it.

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2 V

9 V

18 V

36 V

In which of the following the speed of sound will be maximum under similar conditions.

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N2

O2

CO2

H2

The negative of the potential gradient is

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Potential energy

Electrostatic force

Electric field intensity

Electromotive force

A Galilean telescope with objective of coal length 30 cm and eyepiece of focal length.8 cm when focused for infinity has length equal to

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7.5 cm

2.2 cm

38 cm

240 cm

When ever current is drawn from a cell Its terminal potential difference and emf become

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Different

Same

Zero

Negative

Which of the following is an example band spectra.

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Black body radiation spectrum

Atomic spectra

Molecular spectra

Anomalous spectrum

The binary equivalent of 25 is

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111001

11001

1001

10101

Marie Curie and Pierre Curie discovered two new radioactive elements which are.

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Uranium and radkum

Platinum and radium

Polonium and radium

Crypton and radon

The sound velocity in moist air as compared to dry air will be

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More

Less

Same

zero

The force of gravity between two objects does not depend upon the.

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Constant of gravitation

Separation

Product of their masses

Sum of their masses

An induced emf in a coil is independent of

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Time

Resistance

the number of turns in a coil

The charge in the magnetic flux

The magnus effect is equivalent to

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Bernouli's theorem

Archimedes principle

Pascal's law

Blood pressure

The process is which volume of the system remains constant.

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Isobaric process

Isochoric process

Isothermal process

Adiatatic process

A spring of force constant k is out into three equal pats. The force constant of earth part will b e.

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k

3 k

k/3

k/2

X-rays are a part of electromagnetic spectrum and are characterized by frequencies higher that those of.

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Infrared radiation

Ultraviolet radiation

Far ultraviolet radiation

Far infrared radiation

The change in wavelength of an X-ray when scattered from an electron is called.

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Compton shift

Doppler shift

Stefan's law

Fraunhofer lines

If a body retains completely its altered shape and size, it is said to be

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Perfecto elasticity

Perfect plasticity

Elasticity

elastic limit

Infrared radiation is also known as

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Radio signals

Heat radiation

Magnetic resonance waves

RADAR

Which of the following pair does not have identical dimensions.

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Energy and torque

Momentum and impulse

Mass and moment of inertia

Energy and work

Ionization of a hydrogen atom originally in its ground state takes a minimum out of energy equal to.

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2.4 J

4.2 J

12.3 eV

13.6 eV

During an adiabatic gas expansion the environment

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Serves as a heat sink

Serves as a heat source

Must be at a higher temperature than the gas

Does not have to participate

The potential difference between two points is equal to the difference of

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Kinetic energy

potential energy

Electric current

Charge energy

Which of the following in the best container for gas during adiabatic process.

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Copper vessel

Thermos flask

Glass container

Wooden container

An object falls freely under gravity the vertical equilibrium of the body inside is

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Stable

Unstable

Neutral

Unknown

The constant lamda is called the.

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Decay constant

Gas constant

Planck's constant

Dose constant

Which type of radiation would be stopped completely by a thin piece of cardboard.

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Alpha particles

Beta particles

Gama rays

X -rays

In the experiment of production od x rays electrons are accelerated towards the anode by

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Thermionic emission

Potential difference

Breaking potential

Cut of currrent

The SI unit of density is.

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kg m2

kg m-2

kg m-3

kg m2 s-2

Which of the following has greatest binding energy per nucleon.

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Normal hydrogen

Deuterium

Tritium

Helium-4

The Lenz's law is also a statement of the law of conservation of.

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Energy

Mass

Momentum

Torque

How eddy current losses are reduced in A F and R F transformers.

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By using air cores

By using shell cores

By using laminated cores

By using ferrite cores

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