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Electricity and Magnetism MCQ question and answer with solution | Physics Gk MCQs

Learn Electricity and Magnetism MCQ Questions and answers with easy and logical explanations in Physics Gk . Electricity and Magnetism MCQ question provides all type of technical mcq questions which is important for SSC-CGL, UPPSC, NDA, CDS and all govt examinations Page-1 section-4

Each section contains 100 MCQs on Electricity and Magnetism .
1
Flemings "Left hand Rule" is associated with the effect of
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Answer & Solution
Answer: Option D
No explanation is given for this question. Let's Discuss on Board
2
Two identical resistors of 10Ω are connected in parallel in a circuit. This combination is connected with third resistor of 10Ω in series. The equivalent resistance of the combination will be equal to . . . . . . . .?
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Answer & Solution
Answer: Option C
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3
Which of the following are insulator?
1. Mica and Quartzs
2. Metal and Rubber
3. Metals and Mica
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Answer & Solution
Answer: Option D
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4
How many units of electricity will be consumed if you use a 60 watt electric bulb for 5 hours everyday for 30 days?
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Answer & Solution
Answer: Option B
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5
A transformer works on the principle of
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Answer & Solution
Answer: Option B
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6
The product of conductivity and resistivity of a conductor
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Answer & Solution
Answer: Option C
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7
If resistance increases then electric current . . . . . . . .
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Answer & Solution
Answer: Option B
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8
Which of the following is a Paramagnetic substance?
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Answer & Solution
Answer: Option B
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9
Three equal resistances of 6Ω are connected in parallel with each other in a circuit. The equivalent resistance of this combination will be . . . . . . . .
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Answer & Solution
Answer: Option B
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10
Of the two bulbs,one glows brighter than the other. Which bulb has a higher resistance?
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Answer & Solution
Answer: Option C
Solution:
The brightness of a bulb depends on the power (P) it dissipates, which is given by the relation:

P = V² / R (when the bulbs are connected in parallel)

or

P = I² × R (when the bulbs are connected in series)

When two bulbs are connected to the same voltage supply, the bulb with the lower resistance allows more current to flow through it and therefore dissipates more power, making it brighter.

On the other hand, the bulb with the higher resistance allows less current to pass through, so it dissipates less power and glows dimly.

Thus, the dim bulb always has the higher resistance when both bulbs are connected across the same voltage source.

Therefore, the correct answer is Option D: The dim bulb.