Solution : The direction of torque is always perpendicular to the plane containing `vecr and vecF`. It is given by right hand rule.
What are the 3 right hand rules in physics?
Some would claim that there is only one right-hand rule, but I have found the convention of three separate rules for the most common situations to be very convenient. These are for (1) long, straight wires, (2) free moving charges in magnetic fields, and (3) the solenoid rule – which are loops of current.
What is the current right hand rule?
An electric current passes through a solenoid, resulting in a magnetic field. When you wrap your right hand around the solenoid with your fingers in the direction of the conventional current, your thumb points in the direction of the magnetic north pole. An electric current passes through a straight wire.
How is the direction of magnetic torque determined?
The direction of magnetic torque is given by the RHR for cross-product, or you can just remember that the dipole always wants to line up with the magnitude field. The direction of magnetic torque will be such that will make µ align with B.
What does Fleming’s right-hand rule state?
Fleming’s right-hand rule gives which direction the current flows. The right hand is held with the thumb, index finger and middle finger mutually perpendicular to each other (at right angles), as shown in the diagram. The thumb is pointed in the direction of the motion of the conductor relative to the magnetic field.
What is the first right-hand rule?
The first right hand rule deals with the force applied by a magnetic field to a positive charge that is moving perpendicularly through that field. In this case, the three fingers represent the direction of the magnetic field, the index finger represents the direction in which the charge is moving.
Is right-hand rule for electrons or protons?
From the right hand rule for magnetic force, the force is pointed down on a negatively charged electron.
Why the right-hand rule works?
It works because we use the same right hand rule to determine the force the magnetic field exerts on a current.
What is the difference between Fleming left and right-hand rule?
Fleming’s left-hand rule gives the direction of magnetic force acting on a conductor whereas Fleming’s right-hand rule is used to find the direction of induced current.
At what angle is torque minimum?
(c) Zero (minimum) torque occurs when θ is zero and sin θ = 0.
What is the direction of the torque on the current loop?
Torque causes an object to spin around a fixed axis. Each loop of current has a direction associated with it: its normal vector is perpendicular to the loop, in the direction given by the right thumb when the right fingers curl in the direction of the current.
How do you determine torque?
Measure the distance, r , between the pivot point and the point the force is applied. Determine the angle θ between the direction of the applied force and the vector between the point the force is applied to the pivot point. Multiply r by F and sin θ and you will get the torque.
What is torque in 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.
What is the torque acting on an electric dipole when placed in an electric field?
When an electric dipole moment is kept in an electric field, force acts on both charges in a dipole. The force acting on the charges acts as a couple and the dipole experiences a torque. The torque is maximum when it makes [{{90}^{o}}] with the electric field, which is the most unstable position.
What is the formula of torque in magnetic field?
The formula to calculate the torque on a rectangular loop of wire with multiple turns carrying a current in a magnetic field is = . We can rearrange this equation for the magnetic field strength, : = .
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