Version 001 – Ch23-h1 – chiu – (57890) 1This print-out should have 18 questions.Multiple-choice questions may continue onthe next column or page – find all choicesbefore answering.CoilOfWireMI23p028001 (part 1 of 7) 1.0 pointsIn the figure below of coil of wire with 350turns is connected to a power supply, and acurrent runs in the coil. A single loop ofcopper wire is in the x - y plane, wi
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Version 001 – Ch23-h1 – chiu – (57890) 1

This print-out should have 18 questions.

Multiple-choice questions may continue on

the next column or page – find all choices

before answering.

CoilOfWireMI23p028

001 (part 1 of 7) 1.0 points

In the figure below of coil of wire with 350

turns is connected to a power supply, and a

current runs in the coil. A single loop of

copper wire is in the x - y plane, with its

axis on the same line as the axis of the coil.

The loop and the coil are stationary. The

radius of the coil is 9 cm, and the radius of

the loop is 4 cm. The center of the loop is

2.2 m from the center of the coil. At time t1,

the conventional current I in the coil is 5 A,

and it is not changing. Remember that:

µ0

4π

= 1 × 10-7 N · m/A

Power Supply

+ -

y

x

z

Loop

P b

Coil

I

What is the absolute value of the magnetic

flux through the loop at time t1?

Correct answer: 4.20441 × 10-9 T · m2.

Explanation:

|Φ| = B~ A = 4µπ0 2 N I π r d3 cl c2 (π rℓ2)

= 4.20441 × 10-9 T · m2 .

002 (part 2 of 7) 1.0 points

What is the direction of the electric field at

location P in the copper wire of the loop at

time t1? (Remember that at this time the

current in the coil is constant.)

1. h0, 0, -1i

2. h0, -1, 0i

3. There is no electric field inside the copper

loop. correct

4. h0, 0, 1i

5. h0, 1, 0i

6. h1, 0, 0i

7. h-1, 0, 0i

Explanation:

There is no electric field given in the problem and the magnetic field at this time is not

changing so there is no induced electric field.

003 (part 3 of 7) 1.0 points

At a later time t2, the current in the coil

begins to decrease. Now what is the direction

of the electric field in the loop at point P?

1. h1, 0, 0i

2. h0, 0, 1i

3. There is no electric field inside the copper

loop.

4. h0, -1, 0i correct

5. h0, 0, -1i

6. h-1, 0, 0i

7. h0, 1, 0i

Explanation:

dI

dt = -0.3 A/s

and E~ NC is in the -y direction

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