* 47% 7:35 PM blackboard.kean.edu AT&T; ESTION Suppose you have a 100 turn solle

Question

* 47% 7:35 PM blackboard.kean.edu AT&T; ESTION Suppose you have a 100 turn sollenoid and pull it out quickly. The solenoid is 12 cm on a side and has a resistance of 75 ohms and is being pulled out of a 5 T magnetic field in 0.25 seconds. What is the induced emf? Oszv A rectangular loop of wire with a size of 10x20 cm is placed in a uniform magnetic field of 2 T. Find the magnetic flux through the loop when the angle between the field and the normal to the loop is 60° A square coil of wire with 10 turns and an area of 0.5 m2 is placed in a parallel uniform magnetic field of 0.75 T. The col is turned so it is now perpendicular to the magnetic field. This action takes 0.15 s to complete. What is the emf induced in the coil? Bin

Explanation / Answer

Ans 1:

We are given that:

Number of turns, N = 100

Length of side, l = 0.12 m

Magnetic field B = 5 T

time duration of solenoid in magnetic field, t = 0.25 s

Not Induced EMF E = -Nd/dt

where is Flux

E = -N(f - i)/t

f = final flux = 0

i = initial flux = BAcos(0) = 5*(0.12*0.12) = 0.072

E = -100*(0-0.072)/0.25 = 28.8 V ~ 29 V

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