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Part A Exercise 29.28 Calculate the magnitude of the emf induced in the circuit.

ID: 1643925 • Letter: P

Question

Part A Exercise 29.28 Calculate the magnitude of the emf induced in the circuit. Express your answer using two significant figures A 1.30-m-long metal bar is pulled to the right at a steady 5.7 m/s perpendicular to a uniform, 0.730-T magnetic field. The bar rides on parallel metal rails connected through R 25.6-2, as shown in the figure (Figure 1) so the apparatus makes a complete circuit. You can ignore the resistance of the bar and the rails. Submit My Answers Give Up Part B Find the direction of the current induced in the circuit. clockwise Figure 1 of 1 counterclockwise Submit My Answers Give Up Correct Part C Calculate the current through the resistor. Express your answer using two significant figures.

Explanation / Answer

Given,

Length of metal bar, l = 1.30 m

Velocity, v = 5.7 m/s

Magnetic field, B = 0.730 T

Resistance, R = 25.6 ohm

a) Magnetic flux associated with the circuit is (t) and

   emf, = d(t) / dt = B x l x v = 0.730 x 1.30 x 5.7 = 5.41 V

c) Current through resistor, I = (V/R) = (5.41 / 25.6) = 0.211 A

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