Every Book Back multiple-choice question from Electricity (10th Standard Science, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Explanation. Electric current is defined as the rate of flow of charges in a conductor, which represents the amount of charge passing through any cross-section in unit time.
Q2
SI unit of resistance is
A. mho
B. joule
C. ohmCorrect
D. ohm meter
Explanation. The SI unit of resistance is ohm, represented by the symbol \(\Omega\). It is defined as the ratio of potential difference to the current.
Q3
In a simple circuit, why does the bulb glow when you close the switch?
A. The switch produces electricity.
B. Closing the switch completes the circuit.Correct
C. Closing the switch breaks the circuit.
D. The bulb is getting charged.
Explanation. An electric circuit must be a closed conducting path for electrons to flow. Closing the switch completes the loop, allowing current to pass and light the bulb.
Q4
Kilowatt hour is the unit of
A. resistivity
B. conductivity
C. electrical energyCorrect
D. electrical power
Explanation. Kilowatt hour (kWh) is a larger unit of electrical energy, representing the product of electric power and the duration of usage, and is commonly referred to as a unit of electricity.
These are the Book Back multiple-choice questions for Electricity from the Tamil Nadu State Board (Samacheer Kalvi) 10th Standard Science syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Electricity?
This chapter has 4 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 10th Standard Science MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Electricity book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
