Exercise 29.28 A 1.20-m-long metal bar is pulled to the right at a steady 5.3m/s

Question

Exercise 29.28

A 1.20-m-long metal bar is pulled to the right at a steady 5.3m/s perpendicular to a uniform, 0.795-T magnetic field. The bar rides on parallel metal rails connected through R = 24.6-?, 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.

Part A

Calculate the magnitude of the emf induced in the circuit.

Express your answer using two significant figures.

Part C

Calculate the current through the resistor.

Express your answer using two significant figures.

Exercise 29.28 A 1.20-m-long metal bar is pulled to the right at a steady 5.3m/s perpendicular to a uniform, 0.795-T magnetic field. The bar rides on parallel metal rails connected through R = 24.6-?, 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. Part A Calculate the magnitude of the emf induced in the circuit. Express your answer using two significant figures. Part C Calculate the current through the resistor. Express your answer using two significant figures.

Explanation / Answer

1) Emf Induced= Bvl

=0.795*5.3*1.2

=5.05 Volts

2) We know V=IR, R=24.6 ohms and V=5.05 volts

So I=V/R=5.05/24.6

=0.205 Amps

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