this image is for question 1: question 1: A circuit consisting of conducting rai

Question

this image is for question 1:

question 1: A circuit consisting of conducting rails, a sliding conducting bar, and a resistor is shown. The length of the bar is 0.2 m, and the resistance of the resistor is 10 . The circuit is immersed in a uniform magnetic field of 3 T, perpendicular to the circuit and pointing out of the page, and the bar is pushed at a constant speed of 1 m/s. The rate of heat production in the resistor is most nearly

this image is for question 1:

question 2: A transformer with an input current of 0.500 A has 6000 primary turns. How many secondary turns must the transformer have if an output current of 6.00 A is desired? 0.2 m 1 m/s 10 3 T

Explanation / Answer

Question 1

According to the question;

We know that

length l = 0.2m

magnetic field = B = 3T

velocity v = 1m/se

induced emf = E= BVL = 0.2*3*1= 0.6V

That's

current i = E/r = 0.6/10

= 0.06 amp

Then,

rate of heat production = i^2 r

= 0.036watts

Question 2

According to the question

Given

i = 0.5 A
N = 6000
i ' = 6A
N ' = ?
we know that
i ' / i = N / N '
from this N ' = N ( i / i ')

=6000(0.5/6)
= 500

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