presence magnetic field into the page, as shown. A 4-ohm resistor is connected into the circuit. 4Ω m/s a) What current flows in the loop? b) What force is required to maintain the constant 2 m/s velocity? c) How much work must be done by this force in 1 second? -0.1 m d) Calculate the power dissipated by the resistor, and compare this power to the work found in part (c).

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A bar is moved along conducting rails at a constant 2.0 m/s in the presence of a 1-tesla
magnetic field into the page, as shown. A 4-ohm resistor is connected into the circuit.
4Ω
A
2 m/s
a) What current flows in the loop?
b) What force is required to maintain the constant 2 m/s velocity?
c) How much work must be done by this force in 1 second?
-0.1 m
d) Calculate the power dissipated by the resistor, and compare this power to the work
found in part (c).
Transcribed Image Text:A bar is moved along conducting rails at a constant 2.0 m/s in the presence of a 1-tesla magnetic field into the page, as shown. A 4-ohm resistor is connected into the circuit. 4Ω A 2 m/s a) What current flows in the loop? b) What force is required to maintain the constant 2 m/s velocity? c) How much work must be done by this force in 1 second? -0.1 m d) Calculate the power dissipated by the resistor, and compare this power to the work found in part (c).
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