(a) What is the current in an 6.00 ? resistor R ? A (b) What is the rate of ener

Question

(a) What is the current in an 6.00 ? resistor R?
A

(b) What is the rate of energy dissipation in the resistor?
W

(c) What is the mechanical power delivered by the constant force?
W

A conducting rod of length (a) What is the current in an 6.00 ? resistor R? A (b) What is the rate of energy dissipation in the resistor? W (c) What is the mechanical power delivered by the constant force? W that is directed into the page. moves on two horizontal frictionless rails, as in the figure below. A constant force of magnitude 2.00 N moves the bar at a uniform speed of 4.00m/s through a magnetic field

Explanation / Answer

The changing Magnetic field will result in an induced EMF

E=BVL

This in turn result in a magnetic force on the wire

F=ILXB=ILB

a...I=E/R=BVL/R=FV/I

I=sqrt(FV/R)

=sqrt(2*4/6)=1.15

b..P=I^2R=8W

c..P=dW/dt=F.V

=4*2 cos 0 =8W

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