Question # 1

Electromotive force is closely related to.

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Inductance

Magnetic flux density

Potential difference

Electric field intensity

Magnetic effect of current was discovered by

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Faraday

Fleming

Oersted

Ampere

Who studied freely failing bodies using modern scientific method.

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Galileo

Issac newton

Abert Einstein

Alkundi

Light rays after passing through is convex lens.

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Bend away from principal axis

Bend towards participial axis

Remain unriveted

Travel parallel to the principal axis

According to Gauss's law the number of electric field lines crossing any closed surface is.

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numerically equal to the enclosed charge

Equal to the enclosed positive charge

Equal to teh electric field inside the surface

Equal to the charge density on the surface.

Inertial mass and gravitational mass are

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Opposite

Proportional

Weights

Inversely proportional

A horizontal force of 15 N accelerates a 4 kg object rom rest along a horizontal surface at a rate of 3 m s-2 At the end of 2 s the objects momentum will be.

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12 kg m s-1

24 kg m s-1

30 kg m s-1

45 kg m s-1

Which one of the following is an example of a reversible process.

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Work done against friction

Heat produced by current

Melting of ice

See back effect

The gas temperature is increased from 27 ^oC to 127 ^oC What is the ratio of mean kinetic energies.

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3/4

4/3

9/10

10/9

The property of a material to return to it original shape and size on the removal of an external force is called.

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Stress

Strain

Toughness

Elasticity

The velocity at which laminar flow changes to turbulent flow is called.

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Terminal velocity

Escape velocity

Critical velocity

Uniform velocity

A radiation spectrum which is continuously distributed over a frequency region without being broken up into lines or bands is known as.

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Continuous spectrum

Band spectrum

discrete spectra

Absorption spectrum

In an induction coil, the secondary emf is.

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Zero at the break of the circuit

Zero during make of the circuit

Very high during make of the circuit.

Very high during break of the circuit

For which material magnetic susceptibility is negative.

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Paramagnetic

Diamagnetic

Ferromagnetic

All of these

Since light rays are always diverged by concave lenses such lenses

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Cannot form images

Form only black and white images

From only invented image

Form only erect images

Why is a capacitor resistor combination used in oscillators in grid circuit.

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To generate oscillation

To bias the grid automatically

To amplify oscillations

To sustain the oscillations.

For which position, will the maximum blood pressure in the body have the smallest value.

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Standing up right

Sitting relaed

Lying horizontally

Standing on one's head

Two lenses of focal length 'f' are combined the resultant focal length is

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f

2f

f/2

zero

Lissajou's figures are used in a Cathode Ray Oscilloscope while measuring.

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Time period

Frequency

Voltage gain

phase angle

Wattles current is said to flow when phase angle between virtual current and virtual voltage is

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0^o

90 ^o

180 ^o

270^o

The net charge on a condenser is

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Zero

Q/2

2Q

Infinity

The length of piano wire is 1 m and mass is 20 g and it is stretched by a fore of 200 N the fundamental frequency of sound waves produced by the piano will be

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50 Hz

100 Hz

150 HZ

250 Hz

The angle subtended at the centre of a circle by an arc equal to its radius is equal to.

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One rotation

One radian

One degree

One revolution

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

Which of the following propagates at the same speed as velocity of light.

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Heat waves

Sound waves

Shock waves

Beta particles

The critical mass of fissionable uranium -235 can be reduced by

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Adding impurities to it

Heating the material

surrounding it by neutron reflecting material

Surrounding it by neutron absorbing material

Neither the position nor the momentum of a particle can be predicted with arbitrarily great precision is the statement of.

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Archimede's principle.

Heisenberg uncertainty principle

Mosley's law

Schrodinger's wave equation

Reversible alternation of the form of dimensions of a solid body under stress and strain is called.

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elastic limit

Plastic limit

elestic deformation

Plastic deformation

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

The 'x' in X-rays means

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Xenon

Explosion

x for unknown

X makes the spot

The combined resistance of two identical resistors, connected in series is 18 Mega Their combined resistance in a parallel arrangement will be.

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2 Mega

4 Mega

8 Mega

12 Mega

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