Question # 1

The induced emf in a coil is proportional to:

Choose an answer

Magnetic flux through a coil

Rate of change of magnetic flux through the coil

Area of the coil

Product of magnetic flux and area of the coil

In a normally biased n-p-n transistor, an electron c current I_Eflows from the

Choose an answer

emitter into the base

collector into the base

base into collector

none of these

The reactance of a coil when used in the domestic A.C. power supply (220 volts, 50 cycles per second) is 50 ohms. The inductance of the coil is nearly

Choose an answer

2.2 henry

1.6 henry

0.22 henry

0.16 henry

A typical rocket consumes about

Choose an answer

100 kg s^-1of fuel

1000 kg s^-1of fuel

10000 kg s^-1of fuel

100000 kg s^-1of fuel

Average KE of a gas molecule has:

Choose an answer

Direct relation with absolute temperature and inverse relation with pressure

Direction relation with both absolute temperature and pressure

Inverse relation with both absolute temperature and pressure

None of these

In series RC circuit when R=X_c, then the phase angle is

Choose an answer

0°

90°

70°

45°

Back emf is produced due to

Choose an answer

Self induction

Mutual induction

A.C

Lenz's law

The SI unit of magnetic induction is

Choose an answer

Gauses

Tesla

Weber

Weber²

Which one is conservative force

Choose an answer

Electric force

Frictional force

Normal force

Air resistance

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Choose an answer

90°

75°

0°

180°

An electric charge at rest is

Choose an answer

Only an electric field

Only a magnetic field

Both electric and magnetic fields

None of the above

The dimensions of Planck's constant is equal to that of

Choose an answer

Energy

Momentum

Angular momentum

Power

X-rays is a type of electron magnetic radiations of much shorter wavelengths of the order of

Choose an answer

10^-8 m

10^-9 m

10^-10 m

10^-12 m

A particle is moving with a constant speed along a straight line path A force is not required to

Choose an answer

Increase its speed

Decrease its momentum

Change its direction

Keep it moving with the same speed

At terminal velocity the net force acting on it is

Choose an answer

Maximum

Minimum

Zero

None of these

Resolving power of a telescope depends on:

Choose an answer

The magnification of eyepiece

The focal length of objective lens

Diameter of objective lens

Refractive index of objective lens

If the earth were to rotate faster than its present speed the weight of an object will

Choose an answer

Increase at the equator but remain unchanged at the poles

Decreases at the equator but remain unchanged at the poles

Remain unchanged at the decrease but decrease at the poles

When two balls collide then after collision, they rebound with velocities less than the velocities before the impact, because a portion of K.E is lost in the form of

Choose an answer

friction

heat energy

sound energy

all of them

The blood flow is laminar at

Choose an answer

Normal blood pressure

Systolic blood pressure

Diastolic blood pressure

High blood presure

When an electric field is strong the lines are

Choose an answer

Farther

Closer

Parallel

All of them

The electrons, which can wander in the solid, are known as:

Choose an answer

Valence electron

Free electron

Loosely bound electrons

None of these

A person standing near the track of a fast moving train has tendency to fall towards it because of

Choose an answer

Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

More Classes

Other Links

Physics General Science Test Medium Mode 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