
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Transcribed Image Text:4. In the middle of the selenoid with a diameter of D = 2 cm, length L= 20 cm and consisting of
N1 = 1200 turns there is a small coil with a diameter of d = 1 cm. The length of this small coil
is l= 2 cm and consists of N2 = 50 turns
a. Calculate the mutual inductance between the coils.
b. If the current in the şelenoid changes at a rate of 0.5 A / s, calculate the emf induced ɛ
on the small coil.
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- What is the inductance of a coil in which the average emf induced is 21V when the current in the coils increases from 3A to 10A in 2 s?arrow_forwardThe Lens Equation If Fis the focal length of a convex lens and an object is placed at a distance x from the lens, then its image will be at a distance y from the lens, where F, x, and y are related by the lens equation FX y Suppose that a lens has a focal length of 4.8 cm and that the image of an object is 4 cm closer to the lens than the object itself. How far from the lens is the object?arrow_forwardA toroidal solenoid has 800 turns, cross-sectional area of 16.25 cm^2, and an average radius of 14.00 cm.a) Calculate the self-inductance of the coil.b) If the current decreases uniformly from 15.00 A to 12.00 A In 3.00 ms, calculate the self-induced electromotive force in the coil.c) Current is directed from terminal a of the coil to terminal b. Is the direction of the induced electromotive force from a to b, or from b to a? Why?arrow_forward
- please use these description Read the section for moreinformation. The unit ofinductance is the “Henry,”symbolized “H”EMF = Electromotive force= VoltageAnswer must includecorrect units.arrow_forwardThe self-inductance of the circuit in the figure below is 1.10 10-7 H. Find the back emf when the current is increasing at the rate of 2.11 107 A/s.arrow_forwardCoil A is a large 300 turn circular coil of radius 77 cm. Circular coil B has 390 turns, a radius of 5 cm and is located L=99 cm from coil A along the same axis. The planes of the two coils are parallel. A) Find the approximate mutual inductance of this pair of coils. for my answer I got 3.527E-10 H which was wrong B) If the current in coil A varies with time according to I=3t3−8t2−1, where I is in amps and t is in s, find the magnitude of the EMF induced in coil B at time t=2 s.arrow_forward
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