Question # 1

The substances which break just after the elastic limit is reached, are known as

Choose an answer

brittle substances

ductile substances

plastic substances

elastic substances

The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called:

Choose an answer

Critical temparature

Temperature of vaporization

Melting point

Both (A) and (C)

Both (A) and (B)

The number of LED'S needed to display all the digits is:

Choose an answer

Four

Five

Nine

Six

Seven

The waveform of alternating voltage is a:

Choose an answer

Square

Rectangular

Saw-tooth

Sinusoidal

None of these

Work done by the force of friction is always

Choose an answer

Positive

Zero

Negative

Maximum

There is no net transfer of energy by particle of medium in

Choose an answer

Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

Spectrum represents the number of component colours present in certain light in terms of:

Choose an answer

Wavelength

Frequency

Energy

Both (A) and (B)

All of these

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

Choose an answer

2 m

1 m

0.5 m

4 m

The restoring force is ______ and opposite tot he applied force within ______

Choose an answer

Equal, Elastic limit

Different, The walls of the laboratory

Different, Elastic limit

None of these

The vector representation of force experience give the direction of

Choose an answer

magnetic field

current

length of conductor

force

The holes created in the L and M shells are occupied by transitions of:

Choose an answer

Electrons from lower states

Electrons from higher state

Positrons from higher states

Electrons from K shell

Both (A) and (B)

The change of order of vectors in a dot product of two vectors:

Choose an answer

Changes its value

Doesn't change it's value

Changes the direction product quantity

None of these

The domains are of macroscopic size of the order of

Choose an answer

centimeters

meters

millimeters

nanomneters

Heat travels through vacuum by

Choose an answer

Conduction

Convection

Radiation

Both A and B

For the normal operation of the transistor, its

Choose an answer

emitter-base and collector base junctions are forward biased

emitter-base junction is reversed biased and collector base junction is forward biased

emitter-base junction is forward biased and collector-base junction is reverse biased

any one of these

When quarter of a circle is completed, phase of vibration is:

Choose an answer

90°

180°

45°

360°

The size of the image is maximum when its distance from the magnifying glass is:

Choose an answer

0.10 m

0.15 m

0.20 m

0.25 m

The smooth or steady streamline flow is known as

Choose an answer

laminar flow

turbulent flow

both of them

none of them

An ideal choke (used along with fluorescent tube) would be

Choose an answer

A pure resistor

A pure capacitor

A pure inductor

A combination of an inductor and a capacitor

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

Choose an answer

3 x 10²⁰

3 x 10¹⁰

6 x 10²⁰

6 x 10¹⁰

Truth table of logic function:

Choose an answer

Summarizes its output values

Tabulates all its input conditions only

Display all its input/output possibilites

Is not based on logic algebra

None of these

Substances that do not flow easily have

Choose an answer

large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

At higher frequency of the alternating current, the capacitive reactance X_c

Choose an answer

Increases

Decreases

Remains the same

Increases only when the voltage increases

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Choose an answer

circular

elliptical

cycloid

straight line

In a _____ flow, each particle of the fluid is called a streamline and different streamlines ______cross each other.

Choose an answer

Streamline, cannot

Turbulent, cannot

Streamline, can

None of these

If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine, is (Take g=9.8 m/s²)

Choose an answer

9.8 m/s

19.6 m/s

39.2 m/s

98.0 m/s

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:

Choose an answer

Of same magnitude in the same direction

Of different magnitude in the same direction

Of same magnitude but in opposite direction

Of different magnitude in the opposite direction

None of these

The basic circuit element in a d.c. circuit is a/an

Choose an answer

Inductor

Resistor

Capacitor

Battery

Electric lines of force

Choose an answer

Intersect each other

Are always parallel

Are always anti-parallel

Never intersect

None of these

The graphical representation of ohm's law is

Choose an answer

hyperbola

straight line

ellipse

parabola

If electric and gravitational force on an electron in a uniform electric field will be

Choose an answer

E=mg/q

E=q/mg

E=,g/q

E=qg/m

More Classes

Other Links

ECAT Pre General Science 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