An electric dipole is placed making at an angle 60 ° with an electric field of strength 4 × 10 5 N C - 1 . It experiences a torque equal to 8 3 N - m . Calculate the charge on the dipole, if it is of length 4 cm .

The magnitude of the torque on an electric dipole placed in an electric field is given by τ = P E sin θ . . . i , where P is the dipole moment, E is the electric field and θ is the angle between dipole moment and electric field. Given, θ = 60 ° , E = 4 × 10 5 N C - 1 and τ = 8 3 N - m . Length of dipole 2 a = 4 × 10 - 2 m Putting the values in i , we get, P = 4 × 10 - 5 C - m Using the formula of dipole moment P = q 2 a Putting values of 2 a and P from above, we get, q = 10 - 3 C .

An electric dipole is placed making at an angle 60 ° with an electric field of strength 4 × 10 5 N C - 1 . It experiences a torque equal to 8 3 N - m . Calculate the charge on the dipole, if it is of length 4 cm .

The magnitude of the torque on an electric dipole placed in an electric field is given by τ = P E sin θ . . . i , where P is the dipole moment, E is the electric field and θ is the angle between dipole moment and electric field. Given, θ = 60 ° , E = 4 × 10 5 N C - 1 and τ = 8 3 N - m . Length of dipole 2 a = 4 × 10 - 2 m Putting the values in i , we get, P = 4 × 10 - 5 C - m Using the formula of dipole moment P = q 2 a Putting values of 2 a and P from above, we get, q = 10 - 3 C .

E M B I B E

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise (Conceptual Questions)>Q 9

MEDIUM

NEET

IMPORTANT

Earn 100

An electric dipole is placed making at an angle $60 °$ with an electric field of strength $4 \times 10^{5} N C^{- 1}$ . It experiences a torque equal to $8 \sqrt{3} N - m$ . Calculate the charge on the dipole, if it is of length $4 cm$ .

Important Questions on Electrostatics

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise (Conceptual Questions)>Q 12

A system has two charges

q_{A} = 2.5 \times 10^{- 7} C

and

q_{B} = - 2.5 \times 10^{- 7} C

located at points

A

:

(0, 0, - 15 cm)

and

B

:

(0, 0, 15 cm)

, respectively. What is the total charge and electric dipole moment of the system?

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise (Conceptual Questions)>Q 13

A cube of metal is given a charge

(+ Q)

; which of the following statements is true?

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 22 - Electrostatics>Exercise (Conceptual Questions)>Q 15

Shown in the figure is a spherical shell with inner radius $a$ and outer radius $b$ which is made of conducting material. A point charge $+ Q$ is placed at the centre of the shell and a total charge $- q$ is placed on the shell. Charge $- q$ is distributed on the surfaces as :-

Question Image