Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 9

MEDIUM

12th Odisha Board

IMPORTANT

Earn 100

Distinguish between chemical equivalent and electrochemical equivalent of a substance.

Important Questions on Thermal And Chemical Effects of Electric Current

HARD

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 10

Calculate the cost of electricity if a

1 kW

heater is used for

10

days at the rate of

1

hour per day. Assume the cost of energy to be

Re 1.00

per unit.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 11

A d.c. motor taking

5 A

on

220 V

line is

80

percent efficient. Find its power.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 12

Mention why a fuse is used in house wiring.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 13

Two bulbs each of

100

W

are connected in parallel. Find the power consumed by the combination.

HARD

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 14

A

12 V

battery is charged at the rate of

5 A

for

25

hours. Calculate the energy put into the battery in

kW h

.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 15

Calculate the mass of copper liberated in a copper voltameter by the passage of $1 A$ d.c. for $1$ hour. $Z_{C u} = 6.6 \times 10^{- 7} Kg C^{- 1}$ .

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 18

If two electric lamps each of

100 W

,

220 V

are connected in series to a power supply of

220 V

, find the power consumed.

MEDIUM

12th Odisha Board

IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 7 - Thermal And Chemical Effects of Electric Current>MODEL QUESTIONS>Q 21

An electric iron has the marking

880 W

and

220 V

. Calculate the resistance of wire inside the iron

(

in

Ω

)

.