Question # 1

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Choose an answer

2

1

0.5

1.5

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Choose an answer

-2 mv

Zero

2 mv

mv

The process of formation of spectrum is called:

Choose an answer

Interference

Spectroscopy

Dispersion

Reflection

Botha (A) and (D)

The output voltage of half wave rectification is in the form of

Choose an answer

a smooth curve

a smooth wave

pulses

all of the above

The power of an electric generating station is expressed in:

Choose an answer

Kilo Jule

Kilowatt-hour

Kilo watt

Watt

The SI unit of flux density is

Choose an answer

Newton/Amp-meter

Newton-m/Ampere

Newton-m/Amp²

Newton-Amp/meter

The substances in which, atom are so oriented that their fields support each other and the atoms behave like tiny magnets, are called

Choose an answer

diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

An eV is unit of:

Choose an answer

Potential

Energy

Work

Power

Both (B) and(C)

First law of thermodynamic is special case of

Choose an answer

Law of conservation of energy

Charle's law

Law of conservation of mass

Boyle's law

Which quantity has different dimension:

Choose an answer

Work

Pressure

Energy

Torque

The emission of radiations take place in elements, having charge number greater than

Choose an answer

109

82

69

52

In a capacitive circuit

Choose an answer

Current leads voltage by phase ofπ/2

Voltage leads current by phase ofπ/2

Current and voltage are in same phase

Sometime current and sometime voltage leads

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Choose an answer

1 : 2

2 : 1

1 : 4

4 : 1

Scalar product is also called:

Choose an answer

Cross product

Dot product

Product scalar

Product vector

The characteristic of a body executing S.H.M is that its acceleration is

Choose an answer

inversely proportional to displacement

directly proportional to displacement

independent of displacement

equal to zero

Significant figures in 0.0010 are

Choose an answer

Four

Three

Two

One

In RLC series circuit, resonance occurs when

Choose an answer

X_{L > Xc}

X_{L < Xc}

X_{L = Xc}

None of these

There is present in paraffin a large amount of:

Choose an answer

Nitrogen

Hydrogen

Carbon

Baryllium

Lithium

Photoelectric effect takes place with a photon of:

Choose an answer

Very high energy

Very low energy

Low energy

High energy

None of these

Which branch of physics deals with the structure and properties of solids

Choose an answer

Atomic Physics

Plasma Physics

Molecular Physics

Solid state physics

To turn the transistor OFF, the base current is set:

Choose an answer

At maximum value

At zero

Either (A) or (B)

All are correct

None of correct

The nature of thermal radiation is similar to:

Choose an answer

Ultraviolet rays

Light rays

Both of them

None of these

In deriving the Bernoulli's equation, we assume that the fluid is

Choose an answer

incompressible

no viscous

flows in a steady manner

all of them

Rutherford performed an experiment on nuclear reactions in:

Choose an answer

1718 A.D

1818 A.D

1918 A.D

2001 A.D.

1701 A.D.

The chemical behaviour of an atom is determined by

Choose an answer

binding energy

atomic number

mass number

number of isotopes

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

Choose an answer

0.05 m

0.08 m

0.8 m

0.008 m

Acceleration in a body is always produced in the directin of:

Choose an answer

Velocity

Weight

Force

Botha B and C

Binding energy per nucleus is

Choose an answer

greater for heavy nucleus

least for heavy nucleus

greatest for light nuclei

decreases for medium weight niclei

Ohm's law states that

Choose an answer

The current through a resistor is directly proportional to the applied voltage

The voltage across a resistor is directly proportional to the current passing through it

Resistance is the constant of proportionality between the voltage and current

all of these

When a falling body hits ground, its KE changes to _____ energy.

Choose an answer

Potential

Chemical

Mechanical

sound and heat

Blomass includes:

Choose an answer

Crop residue

Natural vegetation

Animal dung

All of these

More Classes

Other Links

Physics ECAT Pre Engineering 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