A bar of length d = 1 m is free to slide without fri ction on horizontal rails as shown in Figure. A uniform magneti c field B = 1.4 T is directed into the pl ane of the figure. Left ends of the rails are connected to a circuit composed ofresistances, R1 = 400, R2 = 10 N, and R3 = 15N, a solenoid with inductance L = 0.5 H , a battery with emf ɛ = 180 V , and a switch S. The bar has mass m = 150 g and resistance R = 5 N. Ignore all other resistance in the circuit due to connecting wires and the rails. Just after the switch is closed, what is the accelerati on of the bar?
A bar of length d = 1 m is free to slide without fri ction on horizontal rails as shown in Figure. A uniform magneti c field B = 1.4 T is directed into the pl ane of the figure. Left ends of the rails are connected to a circuit composed ofresistances, R1 = 400, R2 = 10 N, and R3 = 15N, a solenoid with inductance L = 0.5 H , a battery with emf ɛ = 180 V , and a switch S. The bar has mass m = 150 g and resistance R = 5 N. Ignore all other resistance in the circuit due to connecting wires and the rails. Just after the switch is closed, what is the accelerati on of the bar?
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Physics2(Electricity and Magnetism)
Subjects:
-Faraday’s Law
-Inductance
-Alternating-Current Circuits

Transcribed Image Text:16)
R1
R3
L
x x X
R x
d.
R2
x x x
x x
A bar of length d = 1 mis free to slide without friction on horizontal rails as
shown in Figure. A uniform magneti c field B = 1.4 T is directed into the plane of
the figure. Left ends of the rails are connected to a circuit composed ofresistances,
R1 = 400, R2 = 10 N, and R3 = 15 N, a solenoid with inductance L = 0.5 H , a
battery with emf ɛ = 180 V , and a switch S. The bar has mass m = 150 g and
resistance R = 5 N. Ignore all other resistance in the circuit due to connecting
wires and the rails. Just after the switch is closed, what is the accelerati on of the
bar?
A) 38.4 m/s? B) 17.14 m/s²
C) 8.4 m/s? D) 264 m/s² E) 28 m/s²
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