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Esco Electrical Test Questions And Answers
What is current flow? - ans-D.The flow of
electrons in a circuit
1. What is current flow?
A. The flow of protons in a circuit
B. The flow of neutrons in a conductor
C. The flow of atoms in a wire
D. The flow of electrons in a circuit
Rationale: Current is the movement of electrons (negative
charges) through a conductive path.
2. What is the unit of measurement for current?
A. Volt
B. Ohm
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C. Ampere
D. Watt
Rationale: Current is measured in amperes (coulombs per
second).
3. Which direction do electrons actually flow in a DC circuit?
A. Positive to negative
B. Negative to positive
C. Alternating back and forth
D. Randomly
Rationale: Electrons flow from negative (excess) to positive
(deficit).
4. What is voltage?
A. The speed of electrons
B. Electrical potential difference
C. Resistance to flow
D. Power consumed
Rationale: Voltage is electrical pressure, measured in volts.
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5. A circuit has 12V applied and 3A of current. What is the
resistance?
A. 36Ω
B. 15Ω
C. 4Ω
D. 0.25Ω
Rationale: R = V / I = = 4Ω.
6. What happens to current if resistance increases and
voltage stays the same?
A. Current increases
B. Current decreases
C. Current stays the same
D. Current reverses direction
Rationale: I = V / R, so increasing R decreases I.
7. Which material is the best conductor of electricity?
A. Rubber
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B. Glass
C. Copper
D. Plastic
Rationale: Copper has low resistivity and high conductivity.
8. What is the purpose of an insulator?
A. To allow electron flow
B. To prevent electron flow
C. To store electrons
D. To increase voltage
Rationale: Insulators have high resistance, blocking current
flow.
9. In a series circuit, total resistance is:
A. Less than the smallest resistor
B. Sum of all resistors
C. Average of resistors
D. Product of resistors
Rationale: R_total = R1 + R2 + R3 in series.
Esco Electrical Test Questions And Answers
What is current flow? - ans-D.The flow of
electrons in a circuit
1. What is current flow?
A. The flow of protons in a circuit
B. The flow of neutrons in a conductor
C. The flow of atoms in a wire
D. The flow of electrons in a circuit
Rationale: Current is the movement of electrons (negative
charges) through a conductive path.
2. What is the unit of measurement for current?
A. Volt
B. Ohm
,Page 2 of 122
C. Ampere
D. Watt
Rationale: Current is measured in amperes (coulombs per
second).
3. Which direction do electrons actually flow in a DC circuit?
A. Positive to negative
B. Negative to positive
C. Alternating back and forth
D. Randomly
Rationale: Electrons flow from negative (excess) to positive
(deficit).
4. What is voltage?
A. The speed of electrons
B. Electrical potential difference
C. Resistance to flow
D. Power consumed
Rationale: Voltage is electrical pressure, measured in volts.
,Page 3 of 122
5. A circuit has 12V applied and 3A of current. What is the
resistance?
A. 36Ω
B. 15Ω
C. 4Ω
D. 0.25Ω
Rationale: R = V / I = = 4Ω.
6. What happens to current if resistance increases and
voltage stays the same?
A. Current increases
B. Current decreases
C. Current stays the same
D. Current reverses direction
Rationale: I = V / R, so increasing R decreases I.
7. Which material is the best conductor of electricity?
A. Rubber
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B. Glass
C. Copper
D. Plastic
Rationale: Copper has low resistivity and high conductivity.
8. What is the purpose of an insulator?
A. To allow electron flow
B. To prevent electron flow
C. To store electrons
D. To increase voltage
Rationale: Insulators have high resistance, blocking current
flow.
9. In a series circuit, total resistance is:
A. Less than the smallest resistor
B. Sum of all resistors
C. Average of resistors
D. Product of resistors
Rationale: R_total = R1 + R2 + R3 in series.
