SCS 139: Dr.Prapun Quiz 4
Instructions
1.
2.
3.
4.
5.
Separate into groups of no more than three persons.
Try not to be in the same group that you have been in before.
Only one submission is needed for each group. Late
submission will not be accepted.
Write down all the steps that you have done to obtain your
answers. You may not get full credit even when your answer
is correct without showing how you get your answer.
Do not panic.
Name
ID
1. A 3 H inductor carries a current of 3.0 A. At what rate must the current be changed to produce a 30 V emf
in the inductor?
2. The current in a 3.0 H inductor is given by i  t   3t 3  3t  3 where t is in seconds and i  t  is in amperes.
Find an expression for the magnitude of the inductor emf.
Page 1 of 1
SCS 139: Dr.Prapun Quiz 4
Instructions
1.
2.
3.
4.
5.
Separate into groups of no more than three persons.
Try not to be in the same group that you have been in before.
Only one submission is needed for each group. Late
submission will not be accepted.
Write down all the steps that you have done to obtain your
answers. You may not get full credit even when your answer
is correct without showing how you get your answer.
Do not panic.
Name
ID
1. A 4 H inductor carries a current of 4.0 A. At what rate must the current be changed to produce a 40 V emf
in the inductor?
2. The current in a 4.0 H inductor is given by i  t   4t 4  4t  4 where t is in seconds and i  t  is in amperes.
Find an expression for the magnitude of the inductor emf.
Page 1 of 1
SCS 139: Dr.Prapun Quiz 4
Instructions
1.
2.
3.
4.
5.
Separate into groups of no more than three persons.
Try not to be in the same group that you have been in
Name
ID
before.
Only one submission is needed for each group. Late
submission will not be accepted.
Write down all the steps that you have done to obtain your
answers. You may not get full credit even when your answer is correct without showing how you get your answer.
Do not panic.
1. At a given instant the current and self-induced emf in an inductor are directed as indicated in Figure 1. (a)
Is the current increasing or decreasing? (b) The induced emf is 55 V, and the rate of change of the current
is 5 kA/s; find the inductance.
Figure 1
2. The current in a 5.0 H inductor is given by i  t   5t 5  5t  5 where t is in seconds and i  t  is in amperes.
Find an expression for the magnitude of the inductor emf.
Page 1 of 1
SCS 139: Dr.Prapun Quiz 4
Instructions
1.
2.
3.
4.
5.
Separate into groups of no more than three persons.
Try not to be in the same group that you have been in
Name
ID
before.
Only one submission is needed for each group. Late
submission will not be accepted.
Write down all the steps that you have done to obtain your
answers. You may not get full credit even when your answer is correct without showing how you get your answer.
Do not panic.
1. At a given instant the current and self-induced emf in an inductor are directed as indicated in Figure 1. (a)
Is the current increasing or decreasing? (b) The induced emf is 77 V, and the rate of change of the current
is 7 kA/s; find the inductance.
Figure 1
2. The current in a 7.0 H inductor is given by i  t   7t 7  7t  7 where t is in seconds and i  t  is in amperes.
Find an expression for the magnitude of the inductor emf.
Page 1 of 1