Netk3-08 – Electrical Scientific Principles And Technologies | Verified Exam Questions And Answers - Latest Version 2026/2027

NETK3-08 – ELECTRICAL SCIENTIFIC PRINCIPLES AND
TECHNOLOGIES | VERIFIED EXAM QUESTIONS AND
ANSWERS - LATEST VERSION 2026/2027




NETK3-08
ELECTRICAL SCIENTIFIC PRINCIPLES AND TECHNOLOGIES




1. What is the SI unit of electric charge?
A. Ampere
B. Volt
C. Coulomb
D. Joule
ANSWER : C. One coulomb is the charge carried by a current of one
ampere flowing for one second.
2. A steady current of 5 A flows for 20 s. How much charge has passed?
A. 4 C
B. 25 C
C. 100 C
D. 0.25 C
ANSWER : C. Q = I × t = 5 × 20 = 100 C.
3. Which of the following is the SI unit of electromotive force?
A. Watt
B. Volt
C. Ohm
D. Farad
ANSWER : B. EMF is the energy supplied per unit charge by a source
and is measured in volts.


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,4. A potential difference of one volt exists when:
A. One coulomb of charge flows each joule
B. One joule of energy is transferred per coulomb of charge
C. One joule of energy is used each second
D. One newton acts over one metre
ANSWER : B. By definition, 1 V = 1 J/C.
5. A 230 V supply is connected across a 46 Ω resistor. What current
flows?
A. 0.2 A
B. 184 A
C. 5 A
D. 276 A
ANSWER : C. I = V / R = = 5 A.
6. What resistance draws 3 A from a 12 V supply?
A. 36 Ω
B. 0.25 Ω
C. 4 Ω
D. 15 Ω
ANSWER : C. R = V / I = = 4 Ω.
7. A current of 0.2 A flows through a 47 Ω resistor. What is the
potential difference across it?
A. 235 V
B. 0.0043 V
C. 9.4 V
D. 47.2 V
ANSWER : C. V = I × R = 0.2 × 47 = 9.4 V.
8. Three resistors of 10 Ω, 22 Ω and 33 Ω are connected in series. What
is the total resistance?
A. 5.69 Ω
B. 7260 Ω
C. 33 Ω
D. 65 Ω
ANSWER : D. In series the resistances add: 10 + 22 + 33 = 65 Ω.




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,9. Two 12 Ω resistors are connected in parallel. What is the total
resistance?
A. 24 Ω
B. 12 Ω
C. 3 Ω
D. 6 Ω
ANSWER : D. For two equal resistors in parallel, R total = = 6 Ω.
10. A 6 Ω and a 3 Ω resistor are connected in parallel. What is the
equivalent resistance?
A. 9 Ω
B. 4.5 Ω
C. 2 Ω
D. 18 Ω
ANSWER : C. R = (6 × 3) / (6 + 3) = = 2 Ω.
11. Four 100 Ω resistors are connected in parallel. What is the total
resistance?
A. 400 Ω
B. 25 Ω
C. 100 Ω
D. 50 Ω
ANSWER : B. Equal resistors in parallel: = 25 Ω.
12. A 24 V supply feeds a series circuit of 100 Ω and 200 Ω resistors.
What current flows?
A. 0.24 A
B. 0.12 A
C. 0.08 A
D. 8 A
ANSWER : C. I = V / R total = = 0.08 A.
13. A 12 V supply is connected across a potential divider of 1 kΩ and 3
kΩ in series. What is the voltage across the 3 kΩ resistor?
A. 3 V
B. 4 V
C. 6 V
D. 9 V
ANSWER : D. V = 12 × = 9 V.

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, 14. In a parallel circuit, which quantity is the same across every
branch?
A. Voltage
B. Current
C. Resistance
D. Power
ANSWER : A. All parallel branches are connected across the same two
points, so they share the same voltage.
15. In a series circuit, which quantity is the same through every
component?
A. Current
B. Voltage
C. Resistance
D. Power
ANSWER : A. There is only one path, so the same current flows through
every component.
16. Which law states that the algebraic sum of the currents at a
junction is zero?
A. Kirchhoff's voltage law
B. Ohm's law
C. Kirchhoff's current law
D. Faraday's law
ANSWER : C. Charge cannot accumulate at a junction, so current
entering equals current leaving.
17. Which law states that the algebraic sum of the EMFs and potential
drops around a closed loop is zero?
A. Kirchhoff's current law
B. Kirchhoff's voltage law
C. Lenz's law
D. Coulomb's law
ANSWER : B. This is a statement of conservation of energy around a
closed circuit loop.




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