Two identical conducting balls A and B have positive charges q 1 and q 2 respectively but q 1 ≠ q 2 . The balls are brought together so that they touch each other and kept in thin original positions. The force between them is

greater than that before the balls touched

less than that before the balls touched

same as that before the balls touched

Two identical conducting balls A and B have positive charges q 1 and q 2 respectively but q 1 ≠ q 2 . The balls are brought together so that they touch each other and kept in thin original positions. The force between them is

greater than that before the balls touched

The potential at a point x (measured in μ m ) due to some charges situated on the X -axis is given by V ( x ) = 20 x 2 - 4 volt. The electric field E at x = 4 μ m is given by

10 9 V μ - 1 m - 1 and in the + ve x direction

5 3 V μ - 1 m - 1 and in the - ve x direction

5 3 V μ - 1 m - 1 and in the + ve x direction

10 9 V μ - 1 m - 1 and in the - ve x direction

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12th West Bengal Board

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Two identical conducting balls $A$ and $B$ have positive charges $q_{1}$ and $q_{2}$ respectively but $q_{1} \neq q_{2}$ . The balls are brought together so that they touch each other and kept in thin original positions. The force between them is

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Important Questions on Interaction of Charged Particles, Electric Field and Potential

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12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 53

A conductor has given a charge

- 3 \times 10^{- 7} C

by transferring electrons. Mass increase (in

Kg

) of the conductor and the number of electrons added to the conductor are respectively.

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12th West Bengal Board

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 54

A charge

Q

is placed at each of the opposite corners of a square. A charge

q

is placed at each of the other two corners. If the net electrical force on

Q

is zero, then the

\frac{Q}{q}

equals

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12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 55

Two equal charges are separated by a distance

d

A

third charge placed on a perpendicular bisector at

x

distance from centre will experience maximum coulomb force, when

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12th West Bengal Board

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 56

The bob of simple pendulum is hanging vertically down from a fixed identical bob by means of a string of length

l

. If both bobs are charged with a charge

q

each, time-period of the pendulum is (ignore the radii of the bobs)

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12th West Bengal Board

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 57

A wooden block performs SHM on a frictionless surface with frequency

v_{0} .

The block carries a charge

+ Q

on its surface. If now a uniform electric field

\vec{E}

is switched on as shown in Fig.

2.121

, then the SHM of the block will be

Question Image

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12th West Bengal Board

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 58

A few electric field lines for a system of two charges

Q_{1}

and

Q_{2}

fixed at two different points on the X-axis are shown in the figure, Fig.

2.122

These lines suggest that

Question Image

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12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 59

Charges are placed on the vertices of a square as shown in Fig.

2.123

. Let

\vec{E}

be the electric field and

V

the potential at the centre. If the charges on

A

and

B

are interchanged with those on

D

and

C

respectively, then

Question Image

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 2 - Interaction of Charged Particles, Electric Field and Potential>EXERCISE 2>Q 60

The potential at a point

x

(measured in

μ m

) due to some charges situated on the

X

-axis is given by

$V (x) = \frac{20}{x^{2} - 4}$ volt.

The electric field $E$ at $x = 4 μ m$ is given by

Two identical conducting balls A and B have positive charges q1 and q2 respectively but q1≠q2. The balls are brought together so that they touch each other and kept in thin original positions. The force between them is

Important Questions on Interaction of Charged Particles, Electric Field and Potential

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Two identical conducting balls $A$ and $B$ have positive charges $q_{1}$ and $q_{2}$ respectively but $q_{1} \neq q_{2}$ . The balls are brought together so that they touch each other and kept in thin original positions. The force between them is