Question

- A straight wire, 0.20 m long, moves at a constant speed of 7.0 m/s

Answer 1

(a) The emf induced in the wire is 0.112 V.

(b) The direction of the current will into the page.

(c) The polarity of A will be positive and L will be negative.

(d)  The current flowing through the wire is 0.224 A.

EMF induced in the wire

The emf induced in the wire is calculated as follows;

EMF = BLv

EMF = (8 x 10⁻²) x 0.2 x 7

EMF = 0.112 V

Direction of the current

Since, the magnetic field is out of the page, the current will follow counter clockwise and will point into the page.

Polarity of point A and point L

The current is flowing counter currently, hence the polarity of A will be positive and L will be negative.

Current through the wire

V = IR

I = V/R

I = (0.112)/0.5

I = 0.224 A

Learn more about current here: brainly.com/question/24858512

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