In a certain region of space,electric field is along the z-direction throughout. The magnitude of electric field is however not constant, but increases uniformly along the positive z-direction at the rate of $10^{5} N C^{- 1} m^{- 1}$ . Torque experienced by the system is:

10^{2} N

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10^{- 2} N

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zero

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10^{3} N

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Solution

The correct option is C zero
The force on the dipole is along negative direction of z-axis, so $θ = 180^{o}$
$∴$ Torque on dipole, $τ = P E sin 180^{o} = 0$

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In a certain region of space,electric field is along the z-direction throughout. The magnitude of electric field is however not constant, but increases uniformly along the positive z-direction at the rate of 105NC−1m−1. Torque experienced by the system is:

The correct option is C zeroThe force on the dipole is along negative direction of z-axis, so θ=180o∴ Torque on dipole, τ=PEsin180o=0

In a certain region of space,electric field is along the z-direction throughout. The magnitude of electric field is however not constant, but increases uniformly along the positive z-direction at the rate of $10^{5} N C^{- 1} m^{- 1}$ . Torque experienced by the system is:

The correct option is C zero
The force on the dipole is along negative direction of z-axis, so $θ = 180^{o}$
$∴$ Torque on dipole, $τ = P E sin 180^{o} = 0$