Electrical Circuit Knowledge Check
A concise set of questions designed to assess understanding of core concepts in electrical engineering.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
What is the current through a 10 Ω resistor when a 20 V source is applied across it?
- 2
In a series circuit of three resistors (R1=2 Ω, R2=3 Ω, R3=5 Ω), what is the total resistance?
- 3
A step‑down transformer reduces 240 V to 24 V. If the primary draws 0.5 A, what is the secondary current (ideal transformer)?
- 4
How much energy is stored in a 100 µF capacitor charged to 50 V?
- 5
Which silicon diode forward voltage drop is closest at 1 mA?
- 6
What is the line-to-line voltage in a balanced three‑phase system if the phase voltage is 120 V?
- 7
Applying KVL to a loop containing a 12 V battery, a 4 Ω resistor with 2 A flowing, and an unknown resistor, what is the voltage across the unknown resistor?
- 8
What is the RMS value of a sinusoidal voltage with a peak of 100 V?
- 9
Which PPE is mandatory when working on energized low‑voltage circuits?
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