Question # 1

If the average velocity of an object zero in some time interval, the displacement of the object for that interval will be.

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Infinite

Zero

Increasing

Decreasing

Entropy of universe is increasing day by da due to.

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Power generating processes

Energy used into work

Depletion of ozone

All of the above

Natural radioactivity was discovered in.

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1978

1896

1904

1906

Why are charged capacitors dangerous.

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They can leak a harmful chemicals

They can cause loss of vision

They can release a lethal charge

They can release gama rays.

A body is in a static equilibrium, only when it is

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Moving with uniform velocity

Moving with variable velocity

Moving with uniform acceleration

at rest

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 one the following is not a component of a Bipolar junction Transistor

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Base

Emitter

Collector

Grid

The potential due to which an electron is lifted from gerund state to excited state is.

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Potential gradient

excitation potential

Ionization potential

Potential difference

For capacitors connected is series.

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The difference of potential is same for an

The charge on each is the same

The resultant capacitance is greater than

The charge on each is not the same

Which of the following quantity has a unit that can be expressed in terms of just two different SI base units.

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Area

Change

Electric current

Length

If the transformer turns ratio is 2 and the impedance of primary coil is 250 Ohms then the impedance secondary coil will be.

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

Who explained Browian movement quantitatively.

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Issac Newton

albert Einstein

James Maxewll

Robert Brown

For which process is the relation Delta Q = Delta V true.

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Isothermal

Adiabatic

isobaric

Isochoric

What happen to entropy in an irreversible cycle.

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No gain in entropy

No change in entropy

Loss of entropy

A net gain of entropy

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

Which quantity remains fixed in isobars.

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Mass number

Atomic number

Number of neutrons

Number of protons

The corss product of two vectors is zero when they

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Are parallel to each other

Are perpendicular to each other

Are at an angle of 120 ^o

Both are equal

The internal resistance of a primary cell depends upon the.

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Current dawn form the cell

Concentration of the solution

distance between cell electrodes

All of the above

Which one of the following describes a measure of opposition to alternating current.

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Electrical impedance

Capacitance

Inductance

Admittance

In any collision between two bodies there need nor the conservation of

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Linear momentum

Angular momentum

Total energy

Kinetic energy

Magnetic effect of current was discovered by

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Faraday

Fleming

Oersted

Ampere

Light wave can be polarized because they

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Are transverse in nature

Can be reflected

Have short wavelength

Have high frequncies

What happens to a soap bubble, when some charge is given to it.

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It collapses

It increases in size

It decreases in size

It feels nothing

We get light inside a room in a day time due to

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Interferences

Polarization

Diffraction

Refraction

The electrons behave as wave because.

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They can be diffracted by a crystal

They can be defecting by magnetic field

They can be deflecting by electric field

they can produce ions in gases

What is the amount of mechanical work done to melt 1 g of ic completely

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4.2 J

42 J

80 J

336 J

Who described an ideal heat engine in 1840

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Boyle

Saadi Carnot

Kelvin

Currie

A heart coil is out into two equal parts and only one part is now used in the heater The heat generated will be.

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Halved

One fourth

Doubled

4 times

The wavelength of X-rays is of the ofder of.

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10^-14 m

10^-10 m

10^-9 m

10^-6 m

The magnetic induction is also called the

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Magnetic intensity

Magnetic flux

Magnetic flux density

Magnetic magnetization

halls fall faster than rain drops due to their

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Grater size

Greater mass

Greater area

Structure

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