A circular circuit of radius 30 cm is built to rotate about a pair of insulating posts....

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Physics

A circular circuit of radius 30 cm is built to rotateabout a
pair of insulating posts. The circuit consists of a 100volt
battery, two 25 kW resistors inparallel and one 75 kW
resistor in series. The circuit is exposed to anexternal uniform magnetic field
of magnitude 0.75 Tesla and directed 20 degrees fromthe
normal vector of the circuit and the axis ofrotation.
Calculate the total torque (magnitude and direction) on the
circuit
Calculate the component of the torque on the circuit
(magnitude and direction) at point A (exactly Â¼ of the way
around the loop)
Calculate the component of the torque on the circuit
(magnitude and direction) at point B (exactly 7/8 of the way
around the loop)

Answer & Explanation Solved by verified expert

3.7 Ratings (402 Votes)

The torque is given by T IA x Bi where T torque I current A area of crosssection B magnetic field and x denotes the crossproduct Thus applying formula of crossproduct we have T BIA sin ii where angle between normal vector and axis of rotation Given data Radius r 30 cm 03 m Voltage Vo 100 V Total power P 2 25 75 See Answer

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