Free mock exam
Ohm's Law & Power — Level 3 Electrical Science Practice
Free topic-focused mock exam: 30 random questions from a pool of 35 on Ohm's Law & Power, drawn from the wider Level 3 Electrical Science bank. 35-minute timer, 70% to pass, worked explanation on every question. Use this when you've taken the full mock once and want to drill the topics you got wrong.
- Questions
- 30
- Time limit
- 35 min
- Pass mark
- 70% · 21/30
- Question bank
- 35
Free, no sign-up. Retake as many times as you like — different questions each time.
Sample questions
01What is the formula for Ohm's Law?
- AI = V × R
- BV = I × R
- CR = V × I
- DP = I × R
Why: Ohm's Law states that V = I × R, where V is voltage in volts, I is current in amps, and R is resistance in ohms.
02A circuit has a resistance of 20Ω and draws 5A. What is the voltage?
- A25V
- B15V
- C4V
- D100V
Why: Using V = I × R: V = 5A × 20Ω = 100V
03What is the current through a 50Ω resistor connected to 230V?
- A11,500A
- B4.6A
- C280A
- D0.22A
Why: Using I = V/R: I = 230V ÷ 50Ω = 4.6A
Common questions
Is the Ohm's Law & Power mock exam free?
Yes — 100% free, no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.
Can I retake the mock exam?
Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.
Does this count towards the real qualification?
No — this is independent practice material. To gain the actual qualification you need to sit the official assessment through an approved provider.
