An infinite straight wire carries a current I that varies with time as shown above. It increases from 0 at t = 0 to a maximum value l1 = 4.3 A at t = t1 = 18 s, remains constant at this value until t = t2 when it decreases linearly to a value l4 = -4.3 A att = t4 = 30 s, passing through zero at t = t3 = 26.5 s. A conducting loop with sides W = 20 cm and L = 60 cm is fixed in the x-y plane at a distanced = 39 cm from the wire as shown. I(t) W ti 1) What is the magnitude of the magnetic flux D through the loop at time t = t1 = 18 s? T-m? Submit 2) What is ɛ1, the induced emf in the loop at time t = 9 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. Submit 3) What is ɛ2, the induced emf in the loop at time t = 20 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. Submit

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An infinite straight wire carries a current I that varies with time as shown
above. It increases from 0 at t = 0 to a maximum value l1 = 4.3 A at t = t1
= 18 s, remains constant at this value until t = t, when it decreases
linearly to a value l4 = -4.3 A at t = t4 = 30 s, passing through zero at t = t3
= 26.5 s. A conducting loop with sides W = 20 cm and L = 60 cm is fixed
in the x-y plane at a distanced = 39 cm from the wire as shown.
I,
I(t)
t
d
I
1) What is the magnitude of the magnetic flux o through the loop at timet
= t1 = 18 s?
T-m? Submit
2) What is ɛ1, the induced emf in the loop at time t = 9 s? Define the emf
to be positive if the induced current in the loop is clockwise and negative
if the current is counter-clockwise.
Submit
3) What is ɛ2, the induced emf in the loop at time t = 20 s? Define the emf
to be positive if the induced current in the loop is clockwise and negative
if the current is counter-clockwise.
V Submit
4) What is the direction of the induced current in the loop at time t = t3 =
26.5 seconds?
O clockwise
Counterclockwise
O There is no induced current at t = t3
Submit
5)
What is ɛ4, the induced emf in the loop at time t = 28.25 s? Define the
emf to be positive if the induced current in the loop is clockwise and
negative if the current is counter-clockwise.
Submit
Transcribed Image Text:An infinite straight wire carries a current I that varies with time as shown above. It increases from 0 at t = 0 to a maximum value l1 = 4.3 A at t = t1 = 18 s, remains constant at this value until t = t, when it decreases linearly to a value l4 = -4.3 A at t = t4 = 30 s, passing through zero at t = t3 = 26.5 s. A conducting loop with sides W = 20 cm and L = 60 cm is fixed in the x-y plane at a distanced = 39 cm from the wire as shown. I, I(t) t d I 1) What is the magnitude of the magnetic flux o through the loop at timet = t1 = 18 s? T-m? Submit 2) What is ɛ1, the induced emf in the loop at time t = 9 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. Submit 3) What is ɛ2, the induced emf in the loop at time t = 20 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. V Submit 4) What is the direction of the induced current in the loop at time t = t3 = 26.5 seconds? O clockwise Counterclockwise O There is no induced current at t = t3 Submit 5) What is ɛ4, the induced emf in the loop at time t = 28.25 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. Submit
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