2027 Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
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1. Volt is a measure of:
a) electromotive force, or electrical potential
b) rate of current flow
c) total resistance in a circuit
d) magnetic field strength - Correct Answer: a
2. What is the equation to solve for power (P)?
a) P = V/I
b) P = V(I), power = volt x current
c) P = I(R)
d) P = V + I - Correct Answer: b
3. Which of the following best defines Coulomb's Law (the coulomb)?
a) the SI unit of electrical charge, equal to the quantity of electricity
conveyed in one second by a current of one ampere
b) the unit of resistance in a circuit
c) the rate at which voltage changes over time
d) the total opposition to current flow in an AC circuit - Correct Answer:
a
4. What is Ohm's law equation?
a) voltage = current / resistance
b) voltage = current x resistance, v = i(r)
c) voltage = resistance / current
d) voltage = power x current - Correct Answer: b
5. In Ohm's law, (I), (a), or sometimes (e) refers to:
a) an ampere (amps)
b) an ohm
, c) a volt
d) a coulomb - Correct Answer: a
6. What is the base unit of charge?
a) a volt
b) an ampere
c) a coulomb
d) an ohm - Correct Answer: c
7. In conventional current flow, electrons flow:
a) from negative to positive
b) from positive to negative
c) in both directions simultaneously
d) they do not move at all - Correct Answer: b
8. In real life, electrons actually flow:
a) from positive to negative
b) from negative to positive (not used for electric engineering)
c) they remain stationary
d) in a circular pattern regardless of polarity - Correct Answer: b
9. The flow of electric charge that regularly reverses in polarity is called:
a) direct current (D/C)
b) alternating current (A/C)
c) static current
d) impedance current - Correct Answer: b
10.The one-directional flow of an electric charge is called:
a) alternating current (A/C)
b) direct current (D/C)
c) reactive current
d) inductive current - Correct Answer: b
11.In an RCL circuit, the phase difference between voltage and current is said
to be:
a) exactly 90 degrees
b) less than 90 degrees
, c) greater than 90 degrees
d) always 0 degrees - Correct Answer: b
12.Solve for V: if the current is set to 2a, with a resistance of 15 ohms, what is
the voltage?
a) 15v
b) 20v
c) 30v
d) 7.5v - Correct Answer: c
13.Solve for i: in a series circuit the voltage is 20v and there are two resistors at
4 ohms and 1 ohm. What is the current value?
a) 2 amps
b) 4 amps
c) 5 amps
d) 20 amps - Correct Answer: b
14.Solve for R: voltage is at 50v with a current of 25 amps. What is the value of
the resistor?
a) 1 ohm
b) 2 ohms
c) 25 ohms
d) 50 ohms - Correct Answer: b
15.When an applied frequency is increased in a circuit containing both an
inductor and a capacitor, what happens to inductive reactance?
a) inductive reactance decreases
b) inductive reactance increases
c) inductive reactance remains constant
d) inductive reactance becomes zero - Correct Answer: b
16.A capacitor opposes any change in the ______ of a defined circuit.
a) current (i)
b) resistance (R)
c) voltage (V)
d) frequency (f) - Correct Answer: c