Question # 1

A person weighing 20 mg walks on a level platform with a speed of 2 ms-1 . The work by the person against the force of gravity is:

Choose an answer

Zero

2J

60J

600J

The minimum energy required by an electron to eject from metal surface is known as:

Choose an answer

Photo energy

Critical energy

Threshold energy

Work function

The time period of revolution of geostationary satellite is

Choose an answer

1440 minutes

24 minutes

84 minutes

none of these

A wave which consists of a single, non-repetitive disturbance is called a

Choose an answer

Continuous wave

Longitudinal wave

Pulse

Transverse wave

The fundamental frequency in a stretched string is 10 Hz. To double the frequency, the tension in it must be changed to:

Choose an answer

T₂ = 2T₁

T₂ = 4T₁

T₂ = T₁

none of these

A gas which strictly obeys the gas laws under all conditions of temperatures and pressure is called:

Choose an answer

Ideal gas

Inert gas

Real gas

None of these

A certain noninverting amplifier has R1 of 1 kΩ and R2 of 100 kΩ. The closed-loop voltage gain is ………

Choose an answer

100,000

100

1000

101

The ‘emf ’ is always even when no current is drawn through the battery of the cell:

Choose an answer

Zero

Present

Absent

Maximum

Bats navigate and find food by:

Choose an answer

Ultrasonic

Echolocation

Refraction

A stone is thrown upwards it returns to ground describing a parabolic path which of the following remains constant:

Choose an answer

Speed of the ball

Kinetic energy of the ball

Vertical component of velocity

) Horizontal component of velocity

A diode as a rectifier converts:

Choose an answer

A)c into D)c

D)c into A)c

Varying D)c current into constant D)c current

High voltage into low voltage and vice-versa

The angular momentum of a body changes from 30 J-S to 50 J-S in 0.5 sec. The torque acting on it is

Choose an answer

40 N-m

100 N-m

50 N-m

150 N-m

A closed organ pipe and an open organ pipe have their first overtones of identicalfrequency. Their respective lengths are in the ratio:

Choose an answer

1 : 2

4 : 3

2 : 3

3 : 5

The mother and daughter elements with the emission of 𝖰 − 𝒓𝒂𝒚𝒔, are called:

Choose an answer

Isotopes

Isobars

Isomers

Isodiapheres

In a gravitational field when work done by gravity is negative then

Choose an answer

P.E increases

P.E decrease

None

P.E remains same

The ratio of output work per cycle to input energy per cycle is called:

Choose an answer

Entropy

Internal energy

Efficiency

None of these

A human eye can detect the electromagnetic radiations of the type:

Choose an answer

Infrared radiations

For- infrared radiations

X-rays radiations

Red radiations

A count rate 240 per minute reduces to 30 counts per min in 1 hour. The half-life of source is:

Choose an answer

20min

60min

80min

90min

In an explosion a body breaks up into two pieces of unequal masses. In this:

Choose an answer

Both parts will have numerically equal momentum

Lighter part will have more momentum

Heavier part will have more momentum

Both parts will have equal kinetic energy

A light and a heavy body have equal momenta. Which one has greater K.E?

Choose an answer

The light body

The heavy body

The K.E are equa

Data is incomplete

The gravity does no work, when the body moves:

Choose an answer

Horizontally

Vertically upwards

Vertically downward

At an angle of 45o with horizontal

A body gets positive charge. It means that:

Choose an answer

It has lost electrons

It has gained positions

It has gained protons

It has gained 𝛼 −particles

How many photons per second does a one-watt bulb emit if its efficiency is 10% and the wavelength of light is 500 nm:

Choose an answer

2.53 × 1017

2.53 × 1019

7.5 × 1019

7.5 × 1017

A body crosses the topmost point of a vertical circle with critical speed. Itscentripetal acceleration, when the string is horizontal will be

Choose an answer

4g

3g

g

6g

Temperature of black body radiating at 270c is increased to 327oc, then emittedenergywill increase by

Choose an answer

2 times

12 times

16 times

4 times

When two objects come to common temperature, the body is said to be in:

Choose an answer

Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

Intensity of light from a point source at the edge of unit sphere will be:

Choose an answer

𝑃

P(4π)

4𝜋

If a body changes its momentum from 100 N s to 200 N s in 10 s then the unbalanceexternal force responsible to change the momentum is

Choose an answer

5 N

2.5 N

2n

10n

Photo cells is a device which convert light into:

Choose an answer

Wave nature

Particle nature

Particle wave nature

Dual nature

The relative permittivity of air is

Choose an answer

1

3.7

7.8

1.0006

Davisson and Germer received the Nobel prize for their work on:

Choose an answer

Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

Beta particles have penetration of about:

Choose an answer

100 times more than that of the gamma particles

100 times less than that of an alpha ray

100 times more than that of an alpha ray

10 times more than that of an alpha particle

The energy of photon of wavelength 620 nm is:

Choose an answer

0.5 eV

1.0 eV

1.5 eV

2.0 eV

Rest mass energy of electron is:

Choose an answer

1.02 MeV

0.51 MeV

931 MeV

200 MeV

More Classes

Other Links

MDCAT Physics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer