Question # 1

a ball is thrown vertically upward. Its velocity at the highest point is.

Choose an answer

10 ms^-2

-10 ms^-1

Zero

none of them

The unit of weather in map is :

Choose an answer

°C

°F

K

mbar

In ___________ (CFC) was found reacting with ozone.

Choose an answer

1920s

1970s

1950s

1960s

The average speed of cheetah is.

Choose an answer

60 kmh^-1

70 kmh^-1

75 kmh^-1

80 kmh^-1

The gravitational field exist _________ the earth.

Choose an answer

One direction

Upward

All aorund

Downward

Unit of strain is:

Choose an answer

Nm^-2

Nm

N

No unit

The direction of momentum is

Choose an answer

opposite to motion

Along the velocity

Perpendicular to motion

None of these

A body is in equilibrium when its

Choose an answer

Acceleration is uniform

Speed is uniform

Speed and acceleration are uniform

Acceleration is zero

Atmospheric pressure is measured by an instrument called:

Choose an answer

Barometer

Altimeter

Meter rod

Hydrometer

The orbital velocity of a satellite revolving at height 'h' above the surface of Earth is given by

Choose an answer

in isolated system the momentum after collision of two bodies.

Choose an answer

Increase

Constnat

Decrease

Zero

Wave transfer

Choose an answer

Energy

Frequency

Wavelength

Velocity

Number of poles in a magnet is:

Choose an answer

One

Two

Three

Unlimited

1 bel=

Choose an answer

0.1 dB

10 dB

100 dB

0.01 dB

Electroscope is used for detecting:

Choose an answer

Current

Charge

Voltage

Resistance

In simple Harmonic motion, the acceleration of the body is _____ proportional to the displacement.

Choose an answer

Inversely

Directly

Equally

None of these

A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be:

Choose an answer

0 volt

30 volts

45 volts

60 volts

If the distance is nspring is 'x' of mass 'm' attached with a spring then restoring force is:

Choose an answer

F =ma

F =kx

F = mx

F= m/a

Electric intensity is a quantity.

Choose an answer

Scalar

Vector

Base

None of these

To see from submarine the ship at the surface of water , we use:

Choose an answer

Telescope

Microscope

Peri scope

Prism

The intensity of lawn mover is:

Choose an answer

10^-1 wm^-2

10^-2wm^-2

10^-1wm^-3

10^-3wm^-2

If there is divergence of leaves by touching a body with electroscope then the body is:

Choose an answer

Semi conductor

Neutral

charge body

Insulator

A force of 100 N makes on angle of 60^owith y axis, its horizontal component is.

Choose an answer

50 N

60 N

70.7 N

86.6 N

A typical diffraction grating has certain number of lines per centimeter whose range is.

Choose an answer

40 to 50

400 to 5000

400 to 500

4000 to 5000

A spring of spring constant 10 N/m after loading that amplitude is 2m. Then the maximum P.E. is

Choose an answer

10 J

20 J

30 J

40 J

A diatomic gas molecules has

Choose an answer

Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

The equations of motion hold good for

Choose an answer

Variable acceleration

Uniform acceleration

Centripetal acceleration

All of these

The maximum velocity necessary to put a satellite into orbit is

Choose an answer

7.1 kms-1

7.3 kms-1

7.9 kms-1

8,9 kms-1

The device used for measurement of liquid flow is.

Choose an answer

Manometer

Barometer

Hydrometer

Venturimeter

The time rate of change of momentum equals

Choose an answer

Weight

Applied force

Impulse

Mass

According to Newton, sound travels in air under conditions of.

Choose an answer

Adiabatic

Isothermal

Isobaric

Isochoric

The acceleration of a projectile along x axis is.

Choose an answer

Zero

Increase

Decrease

Equal to 'g'

The dimension of power is

Choose an answer

MLT-1

ML2T-2

ML2T2

ML2T-3

A light emitting diode emits light only when

Choose an answer

Reverse biased

Forward biased

Unbiased

None of these

The mathematical symbol for NOR operation is

Choose an answer

X = A . B

X = A + D

Electric field intensity at a point is defined by the relation.

Choose an answer

E= q/F

E = F/q

E = qF

E = F/q2

The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.

Choose an answer

Band spectrum

Line spectrum

Continuous spectrum

Absorption spectrum

In Helium Neon laser, discharge tube is filled with Neon gas.

Choose an answer

10%

15%

85%

90%

Photons emitted in inner shell transition are.

Choose an answer

Continuous X -rays

Discontinuous X rays

Characteristic X rays

Energetic X rays

The resistivity of --------------------decrease with the increase in temp

Choose an answer

Gold

Silver

Copper

Silicon

If 10 A current passes through 100 mH inductor, then energy stored is.

Choose an answer

100 J

5 J

20 J

Zero

DC generator by william Sturgeon in:

Choose an answer

1894

1961

1834

1961

Which one pair belongs to acceptor impurity.

Choose an answer

Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

Radioactivity happen due to the disintegration of

Choose an answer

Nucleus

Mass

Electrons

Protons