A 3.45- metal bar, 1.75 long and having a resistance of 10.0 , rests horizontall

Question

A 3.45- metal bar, 1.75 long and having a resistance of 10.0 , rests horizontally on conducting wires connecting it to the circuit shown in the figure (Figure 1) . The bar is in a uniform, horizontal, 1.85- magnetic field and is not attached to the wires in the circuit.

Part A
What is the magnitude of the acceleration of the bar just after the switch is closed?
=



Part B
What is the direction of the acceleration of the bar just after the switch is closed?
What is the direction of the acceleration of the bar just after the switch is closed?
Upward
Downward
To the left
To the right
http://session.masteringphysics.com/problemAsset/1343384/4/YF-27-68.jpg

Explanation / Answer

(ec F = i(ec l imes ec B) = 2(1.75 imes 1.85) = 6.475N) A) F = ma; a = 1.877m/s^2 B) Upwards

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