Electromagnetic Induction in Daily Life — Practice Quiz
Kerala Board · Class 10 · Physics
Try a 4-question quiz on Electromagnetic Induction in Daily Life for Kerala Board Class 10 Physics: tap an answer to check it and see why.
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Quick Quiz: Electromagnetic Induction in Daily Life
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What is the fundamental principle behind electromagnetic induction?
What type of current is produced by electromagnetic induction when a magnet is moved back and forth near a coil?
A transformer has 500 turns in the primary coil and 100 turns in the secondary coil. If 250V AC is applied to the primary, what is the secondary voltage?
What is the main difference between AC and DC generators?
Sample Questions
Which of the following factors increase the induced EMF in a coil? (Select all correct options)
Show answer
Increasing the number of turns in the coil, Using a stronger magnet, Moving the magnet faster
Induced EMF increases with: (1) More turns in coil - more flux linkages, (2) Stronger magnet - higher magnetic field, (3) Faster relative motion - rapid change in flux. Wire thickness affects resistance, not induced EMF.
Which of the following are advantages of transmitting electricity at high voltage? (Select all correct)
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Reduces power loss during transmission, Reduces current in transmission lines, Reduces heat generation in wires
High voltage transmission reduces current (P = VI, so I = P/V). Lower current means less power loss as heat (P = I²R) and reduced heating in transmission lines. It doesn't affect production cost or speed of electricity.
A step-up transformer increases 11kV to 220kV. If the primary has 1000 turns, how many turns does the secondary have?
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20000 turns
Using Vs/Vp = Ns/Np. Given: Vp = 11kV, Vs = 220kV, Np = 1000. Therefore: Ns = (Vs × Np)/Vp = (220 × 1000)/11 = 20000 turns. The voltage ratio is 220:11 = 20:1, so turn ratio is also 20:1.
What type of power stations generate most of India's electricity?
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Thermal power stations
About 75% of electricity generation in India comes from thermal power stations that burn fuels like coal and natural gas to generate steam for rotating turbines.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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