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Resistor MCQs | Resistor Multiple Choice Questions and Answers

(1) The statement which correctly represents Ohm’s law:
[A] V = IR
[B] V = R/I
[C] R = VI
[D] I = R/V
Answer: V = IR
(2) A 10 ohms resistor is powered by a 5-V battery. The current flowing through the source is:
[A] 10 A
[B] 50 A
[C] 2 A
[D] 0.5 A
Answer: 0.5 A

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(3) Repeat the above problem for resistor values of 30 ohms each when the source is 60 V.
[A] 0.25 A
[B] 0.5 A
[C] 2 A
[D] 4 A
Answer: 4 A
(4) Two resistors having values 18 ohms and 50 ohms are connected in series to an unknown source. An ammeter is connected to the circuit which reads 2 A. Find the input voltage to the circuit:
[A] 36 V
[B] 100 V
[C] 136 V
[D] 168 V
Answer: 136 V
(5) Two parallel resistors both having their values 50 and 60 ohms are connected in parallel. The overall current provided by the 100 V source is:
[A] 1.72 A
[B] 2.88 A
[C] 3.66 A
[D] 4.52 A
Answer: 3.66 A
(6) Two resistors having values 5 ohms and 10 ohms are connected in series to a 10 V source. Find the current flowing through the circuit:
[A] 0.66 A
[B] 1.5 A
[C] 2 A
[D] 2.5 A
Answer: 1.5 A
(7) If 1st band = Brown; 2nd band = Black; 3rd band = Brown; and I = 50 mA, then by using Ohm law find the value of source voltage:
[A] 0.5 V
[B] 5 V
[C] 50 V
[D] 500 V
Answer: 5 V
(8) If V9 = 50 V, I9 = 25 μA, then R9 = __:
[A] 2 MΩ
[B] 2 GΩ
[C] 1250 MΩ
[D] 1250 GΩ
Answer: 2 GΩ
(9) If V8 = 15 kV, I8 = 2 nA, then R7 = __:
[A] 7500 kΩ
[B] 7500 GΩ
[C] 30 kΩ
[D] 30 GΩ
Answer: 7500 GΩ
(10) If V5 = 99 kV, R5 = 33 GΩ, then I5 = __:
[A] 5 A
[B] 5 mA
[C] 5 µA
[D] 5 nA
Answer: 5 nA
(11) If V6 = 22 V, R6 = 11 kΩ, then I6 = __:
[A] 5 A
[B] 5 mA
[C] 5 µA
[D] 5 nA
Answer: 5 nA
(12) If V7 = 10 V, I7 = 1 μA, then R7 = __:
[A] 10 kΩ
[B] 10 MΩ
[C] 0.1 kΩ
[D] 0.1 MΩ
Answer: 10 MΩ
(13) A resistor is color-coded with four bands, the first one being brown, second, black, third red, and fourth gold. The resistor connects to a 10 V source. Find the current flowing through the resistor.
[A] 1 mA
[B] 10 mA
[C] 100 mA
[D] 1A
Answer: 10 mA
(14) If 1st band = Yellow; 2nd band = Violet; 3rd band = Brown; and V = 47 V, then I = ___?
[A] 0.1 A
[B] 0.1 mA
[C] 100 mA
[D] 470 mA
Answer: 0.1 A
(15) If 1st band = Red; 2nd band = Red; 3rd band = Red; and V = 44 V, then I = ___?
[A] 20 A
[B] 20 mA
[C] 44 A
[D] 44 mA
Answer: 20 mA
(16) If 1st band = Brown; 2nd band = Black; 3rd band = Green; and V = 50 V, then I = ___?
[A] 1 mA
[B] 100 μA
[C] 5 mA
[D] 50 μA
Answer: 50 μA
(17) If 1st band = Brown; 2nd band = Black; 3rd band = Orange; and I = 50 mA, then by using the formula of Ohm’s law find the value of voltage source which powers the source:
[A] 0.5 V
[B] 5 V
[C] 50 V
[D] 500 V
Answer: 500 V
(18) Two parallel resistors both having their values 28 ohms are connected in parallel. The overall current provided by the 28 V source is.
[A] 1 A
[B] 2 A
[C] 4 A
[D] 8 A
Answer: 2 A
(19) If 1st band = Orange; 2nd band = Orange; 3rd band = Orange; and I = 10 mA, then by using the formula of Ohm’s law find the value of voltage source which powers the source:
[A] 3 V
[B] 33 V
[C] 330 V
[D] 500 V
Answer: 330 V
(20) If V4 = 50 V, R4 = 10 GΩ, then I4 = __:
[A] 5 A
[B] 5 mA
[C] 5 µA
[D] 5 nA
Answer: 5 nA

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