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Assertion: Net electric force on electric dipole is zero in a uniform electric field.

Reason: Value of electric field at axis due to electric dipole is double of equatorial axis of it.

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Important Questions on Electric Charges and Fields

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 95
The torque acting on dipole and potential energy are respectively 

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 96

The torque acting on the dipole and the potential energy are, respectively 

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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 97
An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are, respectively
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 98
An electric dipole of moment p is placed in an electric field of intensity E. The dipole acquires a position such that the axis of the dipole makes an angle θ with the direction of the field. Assuming that the potential energy of the dipole to be zero when θ = 9 0 o , the torque and the potential energy of the dipole will respectively be
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CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 99
An electric dipole of length 1 cm is placed with the axis making an angle of 30° to an electric field of strength104NC-1. If it experiences a torque of 102Nm, the potential energy of the dipole is
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 100

An electric dipole consists of two opposite charges, each of magnitude 1.0 μC separated by a distance of 2.0 cm. The dipole is placed in an external electric field of 105 N C-1. The maximum torque on the dipole is

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CUET (UG)
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 101
An electric dipole of dipole moment (P) is placed in an electric field (E) in stable equilibrium position. Which of the following represents the torque acting on the body?
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Achieve CUET (UG) Physics Practice Book>Chapter 1 - Electric Charges and Fields>Exercise>Q 102
Charge is distributed within a sphere of radius R with a volume charge density ρr=Ar2e-2ra, where A and a are constants. If Q is the total charge of this charge distribution, the radius R is_____.