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LEVEL 2 MODULE 1 ALTERNATING CURRENTS CORRECTLY ANSWERED CERTIFICATION EVALUATION 2026 SOLVED QUESTIONS AND SOLUTIONS GRADED A+

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LEVEL 2 MODULE 1 ALTERNATING CURRENTS CORRECTLY ANSWERED CERTIFICATION EVALUATION 2026 SOLVED QUESTIONS AND SOLUTIONS GRADED A+

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LEVEL 2 MODULE 1 ALTERNATING CURRENTS
Course
LEVEL 2 MODULE 1 ALTERNATING CURRENTS

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LEVEL 2 MODULE 1 ALTERNATING
CURRENTS CORRECTLY ANSWERED
CERTIFICATION EVALUATION 2026
SOLVED QUESTIONS AND SOLUTIONS
GRADED A+

⩥ What is alternating voltage? Answer: A potential difference that
changes direction periodically.


⩥ What is the shape of an alternating waveform? Answer: Sinusoidal.


⩥ What is the period of an a.c. signal? Answer: Time taken for one
complete cycle.


⩥ What is frequency? Answer: Number of cycles per second.


⩥ State the relationship between frequency and period. Answer:
Frequency equals one divided by period.


⩥ What is the frequency of UK mains electricity? Answer: 50 hertz.


⩥ What is the period of UK mains electricity? Answer: 0.020 seconds.

, ⩥ What is peak current? Answer: Maximum value of alternating current.


⩥ What is peak voltage? Answer: Maximum value of alternating
voltage.


⩥ What is root mean square value? Answer: The effective value of an
alternating current or voltage.


⩥ What does rms current represent? Answer: The equivalent dc current
giving the same power.


⩥ State the rms current equation. Answer: Rms current equals peak
current divided by square root of two.


⩥ State the rms voltage equation. Answer: Rms voltage equals peak
voltage divided by square root of two.


⩥ What is the rms voltage of UK mains? Answer: 230 volts.


⩥ What is the peak voltage of UK mains? Answer: Approximately 325
volts.
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