QUESTION 1
A current of 3t^2 flows through a 100 mH inductor. What is the emf across the conductor at t=2s?
1.2 V |
||
-1.2 V |
||
-120 V |
||
120 V |
QUESTION 2
What is the energy stored in a 50 mH inductor if a 20 A current is applied?
10 J |
||
0.5 J |
||
5 J |
||
1 J |
QUESTION 3
A transformer is made using a primary coil with N=100 turns and a secondary coil with N=25 turns. What is the voltage of the second coil if 100 V is applied to the first coil.
400 V |
||
25 V |
||
40 V |
||
2.5 V |
QUESTION 4
A transformer constructed so that N_{s}>N_{p} is a:
Step up transformer |
||
Step down transformer |
||
Neither |
QUESTION 5
A solenoid with a length of 50cm and N=100 has a current of 5 A applied. What is the magnetic energy density?
500 T/m^{2} |
||
1.25 T/m^{2} |
||
0.63 T/m^{2} |
||
1.59 T/m^{2} |
Get Answers For Free
Most questions answered within 1 hours.