State Joule's law of heating?

Important Questions on Electricity

EASY

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 3

An alloy of nickel and chromium is used as the heating element. Why?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 3

How does a fuse wire protect electrical appliances?

HARD

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 4

Explain about domestic electric circuit.

MEDIUM

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 5

What are the advantages of LED TV over the normal TV?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 5

List the merits of LED bulbs.

EASY

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 1

An electric iron consumes energy at the rate of $420 \mathrm{W}$ when heated at the maximum rate and $180 \mathrm{W}$ when heated at the minimum rate. The applied voltage is $220 \mathrm{V}$. What is the current in each case?

EASY

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 2

A $100$ watt electric bulb is used for $5$ hours daily and four $60$ watt bulbs are used for $5$ hours daily. Calculate the energy consumed (in $\mathrm{kW} \mathrm{h}$) in the month of January.

EASY

10th Tamil Nadu Board

IMPORTANT

Science Standard 10>Chapter 4 - Electricity>TEXTBOOK EVALUATION>Q 3

A torch bulb is rated at $3 \mathrm{V}$ and $600 \mathrm{mA}$. Calculate it’s power (in watt).