How to Find Direction of Torque on Current Loop

851 where the direction has been determined with the RHR-1. Its direction can be found from another right-hand rule.

Important Questions For Cbse Class 12 Physics Magnetic Force And Torque Physics Physics Questions Physics Formulas

When current is passed through the loops the magnetic field exerts torque on the loops which rotates a shaft.

. A current of 100 A circulates clockwise in the loop when viewed from the east. Consider the situation where the plane of the loop is not parallel to the magnetic field. Note that the angle between the length of the loop and the magnetic field is always a right angle.

This equation holds for a current loop in a two-dimensional plane of arbitrary shape. An easy way to accomplish the current reversal is to use a split-ring. The direction of Ais perpendicular to the loop in the direction given by the loop RHR.

Where the direction of the vector is given by the right hand rule for axial vectors out of the page since the current is in the counter-clockwise direction in Figure 214. The loop rotates in an anti-clockwise manner due to the torque. τ τ μμ B.

Curl your ngers around with the. Electrical energy is converted into mechanical work in the process. τ μ B I w h z.

Curl the fingers on your right hand in the direction of the current and your thumb stuck out points in. It is conventional to choose it in the right hand rule direction along the axis of rotation. The torque on the loop is thus.

τ F1a2 F2a2 IbB a2 IbB a2 I abB τ IAB The area of the rectangle is ab. Where the area vector is perpendicular to the plane of the loop. Curl your fingers around with the current and your thumb points in the direction of µ.

The force on side 1 is F 1 I a B sin 90 θ i I a B cos θ i 1114 where the direction has been determined with the RHR-1. First nd the magnetic dipole moment of the loop. In general the change in angular velocity is in.

This reversal of the current is done with. 𝐼 3 5 0 𝐼 0. Its direction can be found from another right-hand rule.

τ max N I A B. Torque causes an object to spin around a fixed axis. In general the torque is given by.

In terms of the magnetic dipole moment the torque on a current loop due to a uniform magnetic field can be written simply as. 852 The currents in sides and are perpendicular to and the forces on these sides are. One can find the movement of the torque by the usage of the formula.

What is the direction of the torque on the loop. To find the net force on the loop we have to apply this equation to each of the four sides. τ I lBbsinθ τ I l B b sin.

Curl the fingers on your right hand in the direction of the current and your thumb stuck out points in the direction of the area vector. The current in side 3 flows in the opposite direction to that of side 1 so. Entering known values yields.

The current in side flows in the opposite direction to that of side so. The torque on the dipole is τ µB where B is the external magnetic field. This is IA where Iis the current and the magnitude of Ais the area Aenclosed by the loop.

Solution For sin θ 1 sin θ 1 the maximum torque is τ max N I AB. Torque on the loop can be found using τ N I AB sin θ τ N I A B sin θ. τ τ μ μ B.

Maximum torque occurs when θ 90 θ 90 and sin θ 1 sin θ 1. Flemings right hand thumb rule is used to find out the direction of torque on a current loop. With this change the torque on the loop and therefore the rotation of the loop is always in the same direction.

The direction of A is perpendicular to the loop in the direction given by the loop RHR. The torque acting on the loop of wire 𝜏 can be found using the formula 𝜏 𝐵 𝐼 𝐴 where 𝐵 is the magnetic field strength 𝐼 is the current in the loop of wire and 𝐴 is the area of the loop of wire. τ F 1 bsinθ τ F 1 b sin.

We simply reverse the direction of the current each time the plane of the loop is perpendicular to the field as in Figure 1920d. The force on side is. The loops torque is given by and the loops net force is zero.

The direction of is obtained with the RHR-2if you curl the fingers of your right hand in the direction of current flow in the loop then your thumb points along If the loop contains N turns of wire then its magnetic dipole moment is given by. Considering this how do you find the direction of torque in a magnetic field. A A 200-turn circular loop of radius 500 cm is vertical with its axis on an east-west line.

The magnitude of magnetic force on each length is F 1 I lB F 1 I l B so substituting this value in above equation gives. First we will convert the current in the wire to SI units of amperes. Earths field here is due north parallel to the ground with a strength of What are the direction and magnitude of the torque on the loop.

This physics video tutorial explains how to calculate the torque on a current loop in a uniform magnetic field as well as the magnetic dipole moment. The direction is perpendicular to both the radius from the axis and to the force. How To Find the Torque on a Current Loop in a Magnetic Field 1.

The torque is in the direction of the angular velocity which would be produced by it in the absence of other influences. Open your palms facing it upward and curl your fingers stick out your thumb facing the current and you can find out the movement of. Once the loops surface area is aligned with the magnetic field the direction of current is reversed so there is a continual torque on the loop Figure 852.

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