A rod of mass 0.72 kg and radius 0.06 m rests on two parallel rails that...

A rod of mass 0.72 kg and radius 0.06 m rests on two parallel rails that are d = 0.12 m apart and L = 0.45 m long. The rod carries a current of I = 48 A. If it starts from rest, what is the speed of the rod as it leaves the rails if there is a uniform magnetic field of magnitude 0.24 T directed perpendicular to the rod and rails? Answer in units of m/s.

a) 23.1 m/s

b) 13.1 m/s

c) 15.7 m/s

d) 1.31 m/s

Consider a series RC circuit for which R = 0.9 MΩ, C = 4.5 μF, and V = 28 V. Find the charge on the capacitor 8 s after the switch is closed. Answer in units of μC.

A) 118 μC

B) 108 μC

C) 358 μC

D) 10.8 μC

Two equal charges of magnitude +1 C are separated by a distance of 1 km. What is the force acting between these two charges?

0.9 N
9 N
90 N
9000 N

Expert Solution

genius_generous answered 2 years ago

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