Question # 1

The path followed by the projectile is known as:

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Cycle

Hyperbola

Trajectory

Route

The first super conductor was discovered in

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1811

1890

1901

1911

The life time of metastable state is equal to

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Life time of excited state

Greater than by excited state

Zero

Less than by excited state

When either L or C is increased, the resonant frequency of the RLC series circuit

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Increases

Decreases

Remains the same

Becomes zero

A projectile on its path gets divided into two pieces at its highest point. Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

Most OP-AMP operates with

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+ 6 V supply

+ 10 V supply

+ 12 V supply

+ 24 V supply

Number of supplementary units are

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Three

Two

Seven

Five

Radiation detector are used to

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measure intensity of radiation

measure energy of radiation

difference between different types of radiation

all the above

Two vectors to be combined have magnitudes of 60 N and 35 N. Pick the possible answer:

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100 N

70 N

20 N

Zero

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wave front

Wave number

None of them

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

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how heat is absorbed

how heat extracted

how this conversion takes place

none of them

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

Electrolysis is the study of conduction of electricity through:

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Solids

Liquids

Gases

Plasma

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

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decrease

increase

same

none of these

If the time period a simple pendulum is 2 s, its frequency would be

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2 Hz

1.5 Hz

1.0 Hz

0.5 Hz

We can excite an atom by

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Bombardment of particles

Radiating photons

Providing potential difference

All answer are true

Magnetic induction is also called as:

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Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

An aircraft is moving with a velocity of 300 ms^-1. If all the forces acting on it are balanced, then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

The direction of the acceleration is the same as that of

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speed

velocity

both of them

none of them

Surface tension of water is due to

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Inter molecular attractions

Inter molecular spaces

Inter molecular repulsion

None of above

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

The electric field lines start from:

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Positive charge

Negative charge

Either A and B

Neutron

An atom

Two sources of sound are said to be coherent if

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The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:

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10 m

12 m

13 m

15 m

Energy is stored in the choke coil in the form of

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Heat

Magnetic energy

Electric energy

Electro-magnetic energy

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

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120 C

240 C

20 C

4 C

Viscosity of water is ______ that of air but ___ that of plasma.

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More, more

Less, more

Less, less

More, less

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

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deuterium

protium

tritium

none of these

The number of LED'S needed to display all the digits is:

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Four

Five

Nine

Six

Seven

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