question c 3. a) A 14 turns circular coils is placed on a paper which lies in 1.2 T magnetic fieldpointing inwards to the paper. The coil's diameter changes from 22.5 cm to 7.2 cm in1.8 s.i) Determine the induced current.ii) Calculate the magnitude of the emf induced in the circuit.iii) Calculate the induced current if the circular coil resistance is 7.5 2.b) A circular coil of N turns with current 9.4 mA has inductance 15 mH. Calculate thei) magnetic flux linkage through the coilii) radius of the coil if N = 420 turnsc) A solenoid of inductance 73. mH has a 450 turns and length 24 cm. Determine thei) cross sectional area of the solenoidii) induced emf in the solenoid if its current drops from 3.2 A to zero in55 ms.

Answered: Image /qna-images/answer/dc859e87-38f3-4584-8be2-dab1b3b6fb07.jpg

c) A solenoid of inductance 73. mH has a 450 turns and length 24 cm. Determine the i) cross sectional area of the solenoid ii) induced emf in the solenoid if its current drops from 3.2 A to zero in 55 ms.

c) A solenoid of inductance 73. mH has a 450 turns and length 24 cm. Determine the i) cross sectional area of the solenoid ii) induced emf in the solenoid if its current drops from 3.2 A to zero in 55 ms.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter23: Electromagnetic Induction, Ac Circuits, And Electrical Technologies

Section: Chapter Questions

Problem 9PE: (a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI...

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Concept explainers

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.

Question

question c

3. a) A 14 turns circular coils is placed on a paper which lies in 1.2 T magnetic field
pointing inwards to the paper. The coil's diameter changes from 22.5 cm to 7.2 cm in
1.8 s.
i) Determine the induced current.
ii) Calculate the magnitude of the emf induced in the circuit.
iii) Calculate the induced current if the circular coil resistance is 7.5 2.
b) A circular coil of N turns with current 9.4 mA has inductance 15 mH. Calculate the
i) magnetic flux linkage through the coil
ii) radius of the coil if N = 420 turns
c) A solenoid of inductance 73. mH has a 450 turns and length 24 cm. Determine the
i) cross sectional area of the solenoid
ii) induced emf in the solenoid if its current drops from 3.2 A to zero in
55 ms.

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