Question # 1

Magnetic field inside a solenoid is:

Choose an answer

) Directly proportional to current

Inversely proportional to current

Directly proportional to its length

Inversely proportional to total no of turns

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 radioactive nucleus can emit:

Choose an answer

Electron

𝛼 particles

Positron

Any of these

When the length and area of cross-section both are doubled, then its resistance:

Choose an answer

Will become half

Will remain the same

Will be doubled

Will become four times

The uranium Nucleus 𝟐𝟑𝟖 𝑼 undergoes successive decays, emitting respectively 𝑎 − 𝒓𝒂𝒚,𝖰 − 𝒓𝒂𝒚 𝒂𝒏𝒅 − 𝒓𝒂𝒚𝒔. What is the atomic number and atomic mass of the resulting nucleus:

Choose an answer

90, 238

91, 234

92, 236

92, 238

An engine pumps out 40 kg of water in one second. The water comes out vertically upwards with a velocity of 3ms-1 . What is the power of engine in kilowatt?

Choose an answer

1.2kW

120kW

12kW

1200kW

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

Choose an answer

Infrared radiations

For- infrared radiations

X-rays radiations

Red radiations

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

Choose an answer

𝑃

P(4π)

4𝜋

Which one of the following statements regarding electrostatics is wrong?

Choose an answer

Charge is conserved

Charge is quantized

There is no field near an isolated charge at rest

A moving charge produces both electric and magnetic fields

The spectrum of a star’s light is measured and the wavelength of one of the lines as thesodium’s line is found to be 589 nm. The same line has the wavelength of 497 nm whenobserved in the laboratory. This means the star is

Choose an answer

Moving away from the earth

Moving towards the earth

Stationary

Revolving around the planet

Carnot engine is ____________ heat engine.

Choose an answer

A reversible

An irreversible

An ideal

Both A and C

The rate of decay radioactive substance:

Choose an answer

Is constant

Decrease exponentially with time

Varies inversely with time

Decrease linearly with time

What will be the number of photons emitted per second by 25 W source of monochromatic light of wavelength 600 nm:

Choose an answer

7.5 × 1017

7.5 × 1019

5.5 × 1019

5.5 × 1017

A machine gun fires ‘n’ bullets per second and the mass of each bullet is m. If v is the speed of each bullet then the force exerted on the machine gun is:

Choose an answer

mng

mnv

mnvg

mnv/g

A straight current carrying conductor experiences maximum forces in a uniform magnetic field when it is placed:

Choose an answer

Parallel to the field

Perpendicular o the field

At an angle of 45 to the field

None of these

If velocity time graph is a straight line parallel to time axis then body is

Choose an answer

Moving with zero acceleration

Moving with constant velocity

Covering equal displacement in equal intervals of time

All of these

A non-inverting amplifier has infinite input resistance then the voltage gain of noninverting amplifier will be:

Choose an answer

Zero

Infinite

One

100

For atomic nucleus, the binding energy per nucleon with increase in mass number:

Choose an answer

Increases continuously

Remains same

Decrease continuously

First increases and then decreases with increase in mass number

The example of nuclear fusion is:

Choose an answer

Formation of barium and krypton from uranium

Formation of plutonium -235 from uranium -235

Formation of helium from hydrogen

Formation of water from hydrogen and oxygen

If temperature of the sink is decreased, efficiency of a carnot engine.

Choose an answer

Remains constant

Decreases

Increases

None of these

Which of the particles, electron, proton and neutron moving with same speed has longest wave length?

Choose an answer

Electron

Proton

Neutron

All have same

The half-life of a radioactive element which has only 1//32 of its original mass left after a lapse of 60 days is:

Choose an answer

12days

10days

22days

36days

If the stone is thrown up vertically and return to ground, its potential energy is maximum

Choose an answer

during the upward journey

at the maximum height

at the bottom

The number of molecules in one mole of gas is equal to:

Choose an answer

Avogadro number N_A

Gas constant R

Boltzmann constant k

None of these

A process in which no heat enters or leaves the system is called.

Choose an answer

Adiabatic process

Isothermal process

Isochoric process

None of these

Initially, four identical uniform blocks, each of mass m and thickness h, are spread on a table How much work is done on the blocks in stacking them on top of one another?

Choose an answer

2 mgh

3 mgh

4mgh

6mgh

Charge on a capacitor is 50C. if voltage applied across its plates is 10V then its capacitance:

Choose an answer

5F

0.02F

500F

0.2F

Wavelength of the wave is the distance between the particles of the medium having adifference of:

Choose an answer

Zero

n

2n

𝜋2

The magnitude of potential barrier for Ge is

Choose an answer

0.7 v

0.3 V

7v

3 v

If a rotating body is moving counter clockwise, direction of angular velocity will be

Choose an answer

along linear velocity

towards the center

along the axis of rotation

away from center

The frequency of an open pipe is f. if one end is closed then its fundamental frequencywill be:

Choose an answer

f/2

3f/4

f

2f

The gravity does no work, when the body moves:

Choose an answer

Horizontally

Vertically upwards

Vertically downward

At an angle of 45o with horizontal

The frequency and work function of an incident photon are n and𝝋𝟎. If f0 is the threshold frequency, then necessary condition for the emission of photo electron is:

Choose an answer

< 𝑓0

𝑓 ≥ 𝑓0

f = 𝑓0/2

None of these

A ball takes ‘t’ second to fall from a height 𝒉𝟏 and ‘2t’ second to fall from a height 𝒉𝟐 then h1/h2 is:

Choose an answer

2

4

0.5

0.25

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