DC Circuits
A quiz about dc circuits :D
just 5 Qns to test your understanding :D
pictures are all drawn by myself on paint :D
Questions and Answers
- 1.
There is a circuit with an emf source of 6.0V connected to a lamp and a current flow of 2.0A.Assuming that the wires connecting the whole circuit is resistance free, what is the resistence of the lamp?
- A.
0Ω
- B.
2.0Ω
- C.
3.0Ω
- D.
6.0Ω
Correct Answer
C. 3.0ΩExplanation
V=IR
R=V/I
R=6.0/2.0
R=3.0ΩRate this question:
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- 2.
What is the effective resistance of the circuit?
- A.
12Ω
- B.
(11/3 )Ω
- C.
1Ω
- D.
0Ω
Correct Answer
C. 1ΩExplanation
1/total resistance (parallel)= 1/r + 1/r + 1/r (r being the respective resistance)
in this case
1/effective resistance= 1/6 + 1/3 + 1/2
effective resistance = 1ΩRate this question:
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- 3.
What is the total current of the circuit?
- A.
12.0A
- B.
6.0A
- C.
11.0A
- D.
0A
Correct Answer
A. 12.0AExplanation
I=VR
Total current= total of 3 currents for each branch of a parallel circuit
total current= 12/2 + 12/3 +12/6
= 12.0ARate this question:
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- 4.
What is the maximum possible voltage and current through the circuit?
- A.
6.0V,0.24A
- B.
0V,0.24A
- C.
0V,0.48A
- D.
6.0V,0.48A
Correct Answer
A. 6.0V,0.24AExplanation
I=V/R
=6/25
=0.24A
v=IR
=0.24X25
=6.0VRate this question:
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- 5.
What is the P.D of each resistor?
- A.
24A,48A
- B.
24V,48V
- C.
4V,8V
- D.
4A,8A
Correct Answer
C. 4V,8VExplanation
P.d(1)=(24/[24+48])12
=4V
P.d(2)=(48/[24+48])12
=8VRate this question:
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Current Version
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Mar 03, 2023Quiz Edited by
ProProfs Editorial Team -
Apr 06, 2010Quiz Created by
Prodale270
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