bali.MultipleChoiss.(3 pts. cach) Choose only one answer for each question. Circ
ID: 1788432 • Letter: B
Question
bali.MultipleChoiss.(3 pts. cach) Choose only one answer for each question. Circle your answer on the exam and fill in the gradelT sheet. No partial credit will be awarded for this portion of the test. 1. which one has the correct unit: a) The unit of magnetic field strength is tesla (7) b) The unit of magnetic flux ," is ampere (4) c) The unit of inductance L is farad (F d) The unit of magnetic field strength B is weber (Wb) e) The unit of inductance L is ohm () The capacitor is 6 F and fully charged. Two identical resistors with 2 are connected with the capacitor through a switch. Compare the discharging rate of the capacitor with the switch open and closed. Which case the capacitor discharges more quickly? 2. a) switch is open b) switch is closed c) discharge at the same rate d) Can't say without knowing the initial 2 amount of charge The figure shows an amperian loop with clockwise orientation and currents moving into and out of the paper. 4 = 2A: ½ 3A; 1.-4A; and 1.-SA. The value of the line integral of the magnetic field around the loop . di. 8(T-m). what is the current ls? 3. a) 2A b) 1A c) 0 d) 3A e) 10A 4. The loop in the figure carries a steady current which produces a magnetic field as shown in the figure. What is the current direction in this loop (as observed above the loop) and on which side is the north pole? a) Current clockwise; north pole on bottom b) Current clockwise; north pole on top c) Current counter clockwise; north pole on top d) Current counter clockwise; north pole on bottom e) Current clockwise; north pole on leftExplanation / Answer
1) a) The unit of magnetic field strength B is tesla(T)
2) b) swith is closed
Because, Time period, T = R*C
when switch is closed equivalent resistance decreases so time period decreases. So, capacitor quickly gets discharged.
3) b) 1A
from figure, I_enclosed = 8 A
I3 + I4 - I5 = 8
I5 = I3 + I4 - 8
= 4 + 5 - 8
= 1 A
4) a) Current clockwise; north pole on bottom
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