ITPEC IP April 2026 Question 16
ITPEC IP April 2026 — Question 16 of 100
It can supply 100 mA for one hour — mAh is electric current multiplied by discharge time.
A capacity of 100 mAh represents 100 mA × 1 hour. In an idealized calculation it could also represent 50 mA for two hours or 200 mA for half an hour, because current multiplied by hours remains 100 mAh. Actual usable capacity varies with conditions, but the unit's meaning is unchanged.
Answer (a)
Why not others:
- (b) and (d) interpret capacity as charging duration; mAh does not state how long charging takes
- (c) gives 1 A × 100 minutes = 1,000 mA × 5/3 hours, approximately 1,667 mAh, far above 100 mAh
Key rule: Battery capacity in ampere-hours is current × time; convert amperes to milliamperes and minutes to hours before comparing values.
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