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In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is
A
6 A
B
424 mA
C
4.24 A
D
42.4 A
Correct Answer:
4.24 A
In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is
A
200 mA
B
100 mA
C
282 mA
D
141 mA
Using the mesh current method, find the branch current, IR1, in the above figure.
A
115 mA
B
12.5 mA
C
12.5 A
D
135 mA
For a SCR the maximum rms on-state current is 35 A. If the SCR is used in a resistive circuit for a rectangular wave with conduction angle of 90°. Calculate the average & rms currents respectively.
A
I/4, I/2
B
I/2, I/√2
C
I/4, I2/2
D
I/4, I/√2
If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is
A
50 mA
B
70 mA
C
120 mA
D
40 mA
“In any linear bilateral network, if a source of e.m.f. E in any branch produces a current I in any other branch, then same e.m.f. acting in the second branch would produce the same current / in the first branch”. The above statement is associated with
A
Compensation theorem
B
Superposition theorem
C
Reciprocity theorem
D
None of the above
The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω resistor that makes up part of the parallel circuit is approximately
A
22 mA
B
120 mA
C
220 mA
D
50 mA
In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is
A
48 mA
B
12 mA
C
0 A
D
3 mA
Find branch current IR2.
A
5.4 mA
B
-5.4 mA
C
113.0 mA
D
119.6 mA
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?
A
7.8 mA
B
208 mA
C
200 mA
D
300 mA
E
None of the above
Some birds settled on the branches of a tree. First, they sat one to a branch and there was one bird too many. Next they sat two to a branch and there was one branch too many. How many branches were there?
A
3
B
4
C
5
D
6
E
2
