Free Printable book inside question (1to3)

1.

coulomb force

a)

it act between masses

b)

always attractive

c)

lessor in magnitude

d)

depends on medium

2.

The unit of the constant k in Coulomb law is

a)

$N\ m^2\ Kg^{-2}$

b)

$N^2\ m^2\ Kg^{-2}$

c)

$N\ m^{-2}\ Kg^{-2}$

d)

$N\ m^{-2}\ Kg^2$

3.

If the charges are in motion, force comes into play

a)

coulomb ; lenz

b)

coulomb ; Gauss

c)

coulomb ; lorentz

d)

coulomb ; Fleming

4.

the strength of the force between the two charges in water

a)

Reduced by 80 times than in vacuum

b)

Reduced by 60 times than in vacuum

c)

Increased by 80 times than in vacuum

d)

Increased by 60 times than in vacuum

5.

I) If Negative charge moves towards positive charge

II) If positive charge moves towards negative charge

a)

$V_{in}>v_{final};v_{in}<v_{final}$

b)

$V_{in}<v_{final};v_{in}\ge v_{final}$

c)

$V_{in}<v_{final};v_{in}>v_{final}$

d)

$V_{in}\ge v_{final};v_{in}>v_{final}$

6.

The electrostatic potential energy is maximum when

the dipole is aligned

a)

parallel

b)

anti-parallel

c)

perpendicular

d)

anti-perpendicular

7.

The capacitor is a example for

a)

electric field

b)

electric flux

c)

uniform electric flux

d)

Uniform electric field

8.

To find the electric field for a dipole

a)

Coulomb's law valid; Gauss law not valid

b)

Coulomb's law not valid; Gauss law valid

c)

both valid

d)

both not valid

9.

The force between two charges in vacuum is 0.1N. What is the force if the vacuum is replaced by a medium whose permittivity is 10 times greater than that of vacuum.

a)

0.1N

b)

0.01N

c)

0.001N

d)

0.0001N

10.

Two point charges placed at a distance ‘r’ in the air experiences a certain force, then the distance at which they will experience the same force in the medium of dielectric constant ξ is

a)

$ξr$

b)

$\frac{r}{2}$

c)

$\frac{r}{\sqrt{ξ}}$

d)

$r\sqrt{ξ}$

11.

Emf’s E1 and E2 of two given cells can be compared by using potentio meter with primary circuit of Emf E if

a)

$E1\le E2$

b)

$E1,E2\ge E$

c)

$E1\ge E2$

d)

$E1,E2<E$

12.

In a net work with constant source of emf , if more resistances are added in parallel , the power supplied by the source

a)

increases

b)

remains same

c)

decreases

d)

either increased or decreased

13.

If the resistance of a material increases with increase in temperature then its temperature coefficient of resistance is

a)

zero

b)

negative

c)

positive

d)

none of these

14.

Due to aging , the internal resistance of a cell

a)

increases

b)

decreases

c)

does not change

d)

becomes zero

15.

A 1.15 KW , 230V water heater can draw a current

a)

0.2A

b)

2A

c)

5A

d)

0.5A

16.

The drift velocity does not depend upon

a)

the magnetic field

b)

the mass of the electron

c)

the charge of the electron

d)

the relaxation time

17.

The amount of current flowing through a conductor is directly proportional to

a)

the number of electron per unit volume

b)

the drift velocity

c)

the cross sectional area of the conductor

d)

all the above

18.

When the length of a conductor is cut into two equal parts , one of its resistance is …… and its resistivity is ……

a)

halved; halved

b)

halved; increased twice

c)

increased twice ; halved

d)

halved ; having no change

19.

Seebeck effect is

a)

reversible process

b)

converse of Peltier effect

c)

irreversible process

d)

all the above

20.

Maxwell’s right hand cork screw rule gives

a)

strength of the electric current

b)

direction of the current

c)

strength of the magnetic current

d)

direction of the magnetic field

21.

When the number of turns in a galvanometer is doubled , then

a)

current sensitivity and voltage sensitivity doubled

b)

current sensitivity is doubled and voltage sensitivity remains

unchanged

c)

current sensitivity remains unchanged

d)

voltage sensitivity is doubled

22.

The heat energy developed in a conductor of resistance 10 when 5A current flows through it for a minute is

a)

15000 J

b)

3000J

c)

120J

d)

1500J

23.

The voltage across the shunt resistance

a)

is less than the voltage across the galvanometer

b)

is greater than the voltage across the galvanometer

c)

is equal to the voltage across the galvanometer

d)

none of the above

24.

The force acting on a charge kept in a uniform magnetic field of induction is

a)

inversely proportional to the charge

b)

zero

c)

maximum if the motion is anti parallel to the field

d)

inversely proportional to the magnetic field

25.

For a given T.G. , if the number of turns in the coil is doubled then the reduction factor

a)

increases by 2 times

b)

decreases by 2 times

c)

increases by 4 times

d)

decreases by 4 times

book inside question (1to3)

Total questions: 25

Worksheet time: 13mins

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