Physics Current Electricity PMDC 2021
PMDC Verified Question 77 of 112
Bulb Having Current 200A, and Voltage 220 find Power
A
22kw
B
44kw
C
44watt
D
40 kw
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: 44kw
Concept:

Electrical power is the product of voltage and current.

Formula:

$$ P = VI $$

Solution:

  • Current \( I = 200 \text{ A} \) (Note: unusually high for a real bulb, but treat mathematically).


  • Voltage \( V = 220 \text{ V} \).


  • Power \( P = 220 \times 200 = 44,000 \text{ W} \).


  • Convert to kilowatts: \( \frac{44,000}{1000} = 44 \text{ kW} \).


Why other options are incorrect:

  • Opt A: Matches \( 110 \times 200 \).


  • Opt C: Incorrect units (Watt instead of kiloWatt).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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