1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Lakhmir Singh & Manjit Kaur - Physics

Very Short Answer Type Questions-Pg-5

1 2 3 A 3 B 4 5 6 7 8 9 10

Short Answer Type Questions-Pg-5

1 2 3 4 A 4 B 5 A 5 B

Long Answer Type Questions-Pg-6

1 A 1 B 1 C 1 D 1 E

Multiple Choice Questions (MCQs)-Pg-6

Very Short Answer Type Questions-Pg-11

1 2 3 4 5 A 5 B 6 7 8 A 8 B 9 10 11 12 13 14 15

Short Answer Type Questions-Pg-11

1 A 1 B 2 A 2 B 3 4 A 4 B 5 6 7 8 9 10

Long Answer Type Questions-Pg-12

1 A 1 B 1 C 1 D 1 E

Multiple Choice Questions (MCQs)-Pg-12

Questions Based on High Order Thinking Skills (HOTS)-Pg-12

Very Short Answer Type Questions-Pg-18

1 2 3 4 5 6 7 8 9 10 11 12

Short Answer Type Questions-Pg-18

1 2 3 4 A 4 B 5 A 5 B 5 C 6 A 6 B 7

Long Answer Type Questions-Pg-19

1 A 1 B 1 C 1 D 1 E

Multiple Choice Questions (MCQs)-Pg-19

1 2 3 4 5 6 7 8 9

Questions Based on High Order Thinking Skills (HOTS)-Pg-20

Very Short Answer Type Questions-Pg-26

1 2 3 4 5 6 7 8 9 10 11 12 A 12 B 13

Short Answer Type Questions-Pg-26

1 A 1 B 2 A 2 B 3 A 3 B 4 5 6 A 6 B 7 8 9 10

Long Answer Type Questions-Pg-27

1 A 1 B 1 C 1 D 1 E

Multiple Choice Questions (MCQs)-Pg-27

1 2 3 4 5 6 7 8

Questions Based on High Order Thinking Skills (HOTS)-Pg-27

Very Short Answer Type Questions-Pg-37

1 2 3 4 5 6 7 8 9 10 11 12

Short Answer Type Questions-Pg-38

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Long Answer Type Questions-Pg-41

1 A 1 B 2 A 2 B 3 A 3 B 4 A 4 B

Multiple Choice Questions (MCQs)-Pg-42

Questions Based on High Order Thinking Skills (HOTS)-Pg-43

1 2 3 4 5 6 7 8 9 10 11 12 13

Very Short Answer Type Questions-Pg-47

Short Answer Type Questions-Pg-47

Long Answer Type Questions-Pg-48

1 A 1 B 1 C 1 D

Multiple Choice Questions (MCQs)-Pg-48

Questions Based on High Order Thinking Skills (HOTS)-Pg-48

1 A 1 B 2 3 4 5

Very Short Answer Type Questions-Pg-58

1 2 3 4 5 6 7 8 9 10 11

Short Answer Type Questions-Pg-58

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Long Answer Type Questions-Pg-59

1 A 1 B 1 C 1 D

Multiple Choice Questions (MCQs)-Pg-59

1 2 3 4 5 6 7 8 9 10 11

Questions Based on High Order Thinking Skills (HOTS)-Pg-60

Very Short Answer Type Questions-Pg-66

1 2 3 4 5 6 7 8 9

Short Answer Type Questions-Pg-66

1 A 1 B 2 3 A 3 B 4 5 6 7 8 9 10 11 12 A 12 B 12 C 12 D 12 E

Multiple Choice Questions (MCQs)-Pg-66

1 2 3 4 5 6 7 8 9

Questions Based on High Order Thinking Skills (HOTS)-Pg-67

1 2 A 2 B 3 4 5

Q. 154.3( 10 Votes )

A 2 kW heater, a

Class 10th Lakhmir Singh & Manjit Kaur - Physics 1. Electricity

Answer :

Here for heater we have, P = 2kW, t = 4h

So energy consumed by heater, E = P x t = 2x4 = 8kWh

Here for TV, we have, P = 200W = 0.2kW, time 10pm – 6pm = 4h

So energy consumed by TV, E = P x t = 0.2x4 = 0.8kWh

Here for TV, we have, P = 100W = 0.1kW, t = 4h, number of lamp(n) = 3

So energy consumed by three lamps, E = n x P x t = 3x0.1x4 = 1.2kWh

Total energy consumed by heater, TV and three lamps = 8+0.8+1.2 = 10kWh

Cost of 1kWh = Rs. 5.50

Cost of 10kWh = Rs. 5.50 x 10 = Rs. 55

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSAn electric kettl NEXTWhat is the maxim

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

caricature

view all courses

RELATED QUESTIONS :

Show how would yoScience - Board Papers