# I need help with both questions Problem 1': The conducting rod shown in the accompanying figure...

###### Question:

i need help with both questions
Problem 1': The conducting rod shown in the accompanying figure moves along parallel metal rails that are 25-cm apart. The system is in a uniform magnetic field of strength 0.75 T, which is directed into the page. The resistances of the rod and the rails are negligible, but the section PQ has a resistance of 0.25 2. 25 cm 5.0 m/s 0.25 Ω xxNXxXx (a) What is the emf induced in the rod when it is moving to the right with a speed of 5.0 m/s? (b) What force is required to keep the rod moving at this speed? (c) What is the rate at which work is done by this force? 3
(c) What is the rate at which work is done by this force? (d) What is the power dissipated in the resistor? Problem 2': A long solenoid of radius a with n turns per unit length is carrying a time-dependent current I(0)-lo sin ot where lo and o are constants. The solenoid is surrounded by a wire of resistance R that has two circular loops of radius b with b > a. Find the magnitude and direction of current induced in the outer loops at time 0 2 9

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