What is B.O.T. unit?

Important Questions on Thermal Effect and Chemical Effect of Current

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 2

Electromotive force, energy, power and charge- which one of these has ampere-second as its unit?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 3

What is $\mathrm{kWh}$ (Kilowatt-hour) of electric energy?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 4

What happens to the power dissipation if the value of electric current passing through a conductor of constant resistance is doubled?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 5

Two heater wires of the same dimensions are first connected in series and then is parallel to a source of supply. What will be the ratio of heat produced in the two cases? 

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 6

Two conductors, one having resistance R and another $2R$ are connected in turn across a d.c. source. If the rate of heat produced in the two conductors is $Q_1$ and $Q_2$ respectively, what is the value of $\frac{Q_1}{Q_2}$ ?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 7

Two electric lamps A and B are marked $220 \mathrm{V}-100 \mathrm{W}$ and $220 \mathrm{V}-1000 \mathrm{W}$. Out of the two which lamp has higher resistance?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 8

A heater joined ‘in series’ with a $60 \mathrm{W}$ bulb is connected to the mains. If the $60 \mathrm{W}$ bulb be replaced by a $100 \mathrm{W}$ bulb, will the heat produced by the heater be more, less or remain the same?

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 9

A $25\mathrm{W}$ and a $100\mathrm{W}$ bulb are joined in series and connected to the mains. Which bulb will glow brighter?