Question # 1

Carnot heat engine only used

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isothermal processes

adiabatic processes

both of them

none of them

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

Which of the following can become a good temporarily magnet

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iron

steel

both of them

none of them

A P-N juction or semiconductor diode cannot be used as

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A rectifier

Detector

Oscillator

An amplifier

The force exerted by the fluid in a hydraulic pump on the piston is 10 cm², the fluid pressure on the piston is, in N/cm²

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20

200

2000

20,000

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

The charged nucleus of an atom itself spins its magnetic field

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equal to the field produced by orbital electrons

greater than the field produced by orbital electrons

much weaker than the field produced by orbital electrons

none of these

For multiplication and division purposes, percentage uncertainties are:

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Add

subtracted

Multiplied

Divided

In a metal, the valence electrons are:

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Attached to individual atoms

Not attached to individual atoms

Free to move within the metal

Both A and B

Both A and C

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m.When it is vertically above a point A on the ground a bomb is released from it.The bomb strikes the ground at point B.The distance AB is

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1200 m

0.33 km

3.33 km

33 km

Earth-Sun travel around the galaxy is

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220000 ms^-1

230000 ms^-1

210000 ms^-1

200000 ms^-1

A spectrometer is an optical device used to study the spectra from different sources of light which is

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Absorption spectra

Emission spectra

Discrete spectra

None of these

The force between two charges in 8 N. Now placed a mica of relativity 4 between two charges as a medium, the force then reduced to

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2 N

4 N

6 N

8 N

In a half wave rectifier circuit operating from 50 Hz mains frequency, the fundamental frequency in the ripple would be:

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25 Hz

70.7 Hz

50 Hz

100 Hz

First law of thermodynamic is generalization

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Law of conservation of mass

Law of conservation of energy

Law of heat exchange

None of these

If λ = 589 nm d=1.0 mm L=225 cm then fringe spacing ΔY is given by

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1.76 mm

1.80 mm

1.37 mm

1.33 mm

When the shear stress and shear strain are involved, then their ratio is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

The fundamental quantities which form the base for the SI systems are:

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Mass, energy and time

Mass, force and time

Mass, length and time

Force, length and time

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The expression for the terminal velocity V_t is given by

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V_t = mg/36πη

V_t = mg/6πηr

V_t = mg/6πηa

V_t = mg/6π²ηr

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