How do you find the direction of torque in an electric field?

Contents

If the direction of an electric field is positive, the torque is in the clockwise direction (therefore negative) in the above figure.

What is the formula of electric torque?

To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

What is torque on dipole in uniform electric field?

Torque (τ) = Force × Distance Separating Forces. τ=dqEsinθ Since dipole moment is given by: p=qd. And the direction of the dipole moment is from the positive to the negative charge, it can see from the above equation that the torque is the cross product of the dipole moment and electric field.

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What is the effect of torque in an electric field?

Answer: Even though the two forces on the ends of the dipole cancel as free vectors, they act at different points. This means that they give rise to a torque on dipole. The turning effect of this torque is to reduce the angle q towards zero, and make the dipole moment vector become parallel to the field.

What is the direction of torque on the dipole?

Since ‘qd’ is the magnitude of dipole moment (p), and the direction of dipole moment is from positive to negative charge; torque is the cross product of dipole moment and electric field. If the direction of an electric field is positive, the torque is in the clockwise direction (therefore negative) in the above figure.

What is electric torque?

Electric torque may refer to: Electric torque, responsible for heating water in microwave ovens. The rotational force acting against electric dipole placed in an electric field. The mechanical torque of the electrical motor.

How do you find the torque of a magnetic field?

The torque on the dipole is τ = µ×B, where B is the external magnetic field. The magnitude of this torque is µB sinθ, where θ is the angle between B and µ (that’s just definition of cross-product).

What is dipole direction?

The electric dipole moment, a vector, is directed along the line from negative charge toward positive charge. Dipole moments tend to point along the direction of the surrounding electric field.

What is the direction of field for positive and negative charge densities?

The direction of an electric field for positive charge density is in outward direction and perpendicular to the plane infinite sheet. And for the negative charge density the direction of the field is in inward direction and perpendicular to the sheet.

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How the torque and net force affected when the same dipole is placed in non uniform electric field?

Magnitude of the two forces are equal but in opposite direction. … Once the dipole is aligned in the direction of field, torque vanishes( r x F will be zero, if r and F are in same direction ). Once the dipole is aligned to electric field, the net force will be zero because they are in opposite direction.

Does an electric dipole always experience a torque in electric field?

When a dipole is placed in a uniform electric field and dipole vector direction is not parallel to field direction, each chargs of dipole experiences a force. Magnitude of the two forces are equal but in opposite direction. … Hence in uniform field, dipole experiences only torque.

What is the angle between the electric dipole moment and the electric field?

Dipole moment and electric field are opposite to each other on equatorial line. Hence the angle between them is 180 degrees.

What is torque in magnetic field?

A current-carrying coil kept in a magnetic field experiences a torque, which is the cross product of the magnetic moment and the field vector. Hence, the torque is maximum when the dipole moment is perpendicular to the field, and zero when it’s parallel or antiparallel to the field.

What is the angle between dipole moment vector and electric field vector If torque experienced by the dipole in external uniform electric field is zero?

The dipole is in constant equilibrium if θ = 0. A dipole in stable equilibrium, when Electric filed and dipole moment are perpendicular to each other i.e. the angle between them is zero degrees and torque will be maximum.

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