Question # 1

SI unit of pressure is pascal, which is equal to

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104 Nm-2

1 Nm-2

102 Nm-2

103 Nm-2

Displacement is a quantity.

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Scalar

Vector

Both a and b

None of these

The range of clinical thermometer is:

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90 ^oC - 106^oC

35^oC - 42^oC

100^oC - 132^oC

24^oC - 35^oC

A body of mass 5 kg i moving with a velocity of 10 ms^-1. Find the force required to stop it in 2s.

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5 N

25 N

20 N

30 N

The forces that are parallel to each other and have the same direction are called:

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Like parallel forces

Unlike parallel forces

Resultant forces

Net forces

1 nm have meters.

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10^-3 m

10^-6 m

10^-9 m

10^-10m

Moon is nearly km away from the Earth:

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3,80,000 km

3800 km

3,80 km

38 km

Rooms are heated using gas heater by:

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Conduction only

Convection and radiation

Radiation only

Convection only

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

The ability of body to do work is called:

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Power

Energy

Work

Efficiency

If Fx and Fy are rectangular components of vector F, then its direction is determined by the relation

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θ = sin-1 Fv/Fx

θ = tan-1 Fx/Fy

θ = tan Fx/Fy

θ = tan Fy/Fx

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

According to Coulomb's law , what happens to the attraction of two oppositely charged objects as their distance of separation increases?

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Increase

Decreased

remain unchanged

can not be determined

The value of K in SI unit is:

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9X10²⁰ Nm²C²

8X10⁹Nm²C²

9X10⁹Nm²C²

10X10^-9 Nm²C^-2

The output of a NAND gate is 0 when

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Both of its inputs are 0

Both of its inputs are 1

any of its inputs is 0

any of its inputs is 1

Which is an example of a longitudinal wave?

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Sound wave

Light wave

Radio wave

Water wave

At extreme position potential energy of the pendulum is

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Maximum

Miimum

a and b

zero

The ration of external force applied on the spring to displacement is called:

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Hooke’s law

Constant

Spring constant

Force

The coulomb's law is valid for the charges which are:

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moving and point charges

moving and non-point charges

stationary and pont charges

stationary and large size charges

A conductor of electric current is:

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Wood

Rubber

Plastic

Copper

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power.

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remains unchanged

halves

doubles

four time

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to.

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16 J

8 J

32 J

2 J

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

The apparent change in the pitch of sound due to relative motion is called.

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Carnot theorem

Interference

Doppler effect

Beats

The diver spin faster when moment of inertia becomes.

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smaller

Greater

Constant

Equal

The mass of an object is quantitative measure 0 its

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Momentum

Acceleration

Inertia

Energy

The wavelength of wave produced by microwave oven is.

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12 cm

12 m

18 m

18 cm

Who did give the correct formula for the speed of sound in air?

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Boyle

Laplace

Newton

Einstein

Which of the following is mechanical wave

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Heat

Light

Sound

None of these

The weight of an object an elevator moving down with an acceleration of 9.8 m/s2 will becomes

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Half

Double

Unchanged

Zero

Rate of change of velocity is called

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Speed

Acceleration

Displacement

Torque

The most refined form of matter is:

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Smoke

Light

Ice

Fog

Pair production can take place only when energy of radiation is equal and greater than 1.02 MeV, thus correct option is.

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X rays

Gama rays

Heat Radiation

Ultraviolet rays

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

The radius of hydrogen atom is:

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0.53A°

0.053A°

0.53 x 10^-9

0.053 x10^-9

Various types of cancer are treated by

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Carbon -14

Nickel -63

Cobalt -60

Strontium -90

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

In a pure inductive A.C. circuit the current.

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Lags behind voltage by 90 ^o

Leads the voltage by 90 ^o

In phase with voltage

Leads the voltage by 270 ^o

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

The Balmer series is obtained when all the transition of electrons terminate on

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1^st orbit

2nd orbit

3rd orbit

4th orbit

The self induction emf is some times called.

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Motional emf

Constant emf

Back emf

Variable emf

Ampere second stands for the unit of.

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Charge

emf

energy

Power