The lightbulb in the circuit shown in the figure(Figure 1) has a resistance of 14? and...
The lightbulb in the circuit shown in the figure(Figure 1) has a resistance of 14? and consumes 9.7W of power; the rod is 1.20m long and moves to the left with a constant speed. The strength of the magnetic field is 1.8T .
find current in the circuit. (I)
find speed of the rod (m/s)
Homework Answers
a)
Power
P=I^2*R
9.7=I^2*14
I=0.8324 A
b)
E=IR=0.8234*14
E=11.65 V
induced emf
E=BLv
=>v=E/BL =11.65/1.8*1.2
v=5.4 m/s
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