Class 11 Power Chapter 3 Electrical Wiring Components and Accessories

Class 11 Power Chapter 3 Electrical Wiring Components and Accessories Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 11 Power Chapter 3 Electrical Wiring Components and Accessories Question Answer and select need one. Class 11 Power Chapter 3 Electrical Wiring Components and Accessories Notes Download PDF. AHSEC Class 11 Elective Power Question Answer English Medium.

Class 11 Power Chapter 3 Electrical Wiring Components and Accessories

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 11 Power Chapter 3 Electrical Wiring Components and Accessories Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 11 Power Chapter 3 Electrical Wiring Components and Accessories Textbook Solutions English Medium for All Chapters, You can practice these here.

Electrical Wiring Components and Accessories

Chapter: 3

SESSION 1: IDENTIFYING AND SELECTING THE WIRING MATERIALS AND COMPONENTS

Check Your Progress

A. Fill in the blanks:

1. Wiring material is of three types __________, ____________ and ____________.

Ans: Conducting, insulating, semiconductor.

2. A switch is used to make or break ________________. 

Ans: Electric circuit.

3. Open wiring is also known as ________________ wiring. 

Ans: Capping wiring.

4. _______________ are devices used to control and protect the electrical panel from overflowing electrical power. 

Ans: Circuit breakers.

B. State whether the following statements are True or False:

1. Silver is a bad conductor of electricity. 

Ans: False.

2. Switches are made of conducting material. 

Ans: False.

3. PVC casing and capping are used for covering the wires.

Ans: True.

C. Multiple choice questions:

1. Concealed wiring is immune to____________.

(a) Humidity. 

(b) Heat.

(c) Light. 

(d) Dust.

Ans: (a) Humidity.

2. Pendant holder is used for________________.

(a) Fixing the bulb. 

(b) Fixing the fan. 

(c) For hanging the bulb. 

(d) To hang the fan.

Ans: (a) Fixing the bulb.

3. A two-way switch is used for _________________.

(a) Control one bulb from 2 points. 

(b) Control two bulbs from 2 points. 

(c) Control multiple bulbs from 2 points.

(d) Control one bulb from one point. 

Ans: (a) Control one bulb from 2 points. 

D. Short answer questions:

1. Why is PVC casing-capping preferred over wooden casing-capping wiring?

Ans: Wooden casing-capping wiring is old fashioned. Now PVC or VIR insulated wires are enclosed within the PVC casing enclosure and PVC capping is used to cover the casing.

Advantages of casing-capping wiring —

(i) Easy to install.

(ii) Strong and durable wiring.

(iii) Customization can be done easily.

(iv) Safe from smoke, dust, rain and steam, etc.

(v) No risk of shock due to casing and capping.

2. How does an MCB help in managing electrical power?

Ans: A MCB is used in new constructions instead of the older types of fuses. Circuit breakers are small devices used to control and protect the electrical panel and the other devices from overflowing electrical power.

As with all breakers, the MCB is designed to protect the house from circuit overload. An MCB is much safer than the typical fuse, because it can be reset manually and can handle larger amounts of power. The breaker can manage the flow of energy, distributing the voltage even when many devices run off the same power circuit.

3. Why is conduit wiring used in homes?

Ans: Electrical conduits are used to protect and provide the route of electrical wiring in an electrical system. Electrical conduits are made of metal, plastic, or fibre and can be rigid or flexible. Conduits (Fig. 3.18 and 3.19) must be installed by electricians as per standard regulations. For workshops and public buildings, conduit wiring is the best and most desirable system of wiring. It provides protection and safety against fire.

4. Discuss the importance of colour codes in electrical wiring.

Ans: Wiring for AC and DC circuits are colour coded for identification of individual wires.

AC power circuit wiring colour codes:

Function	Label	New colour	Old colour
Protective ground	P G	Green or green-yellow	Green
Neutral	N	White	Gray
Line, single phase	L	Black or red
Line, three phase	L1	Black	Brown
Line, three phase	L2	Red	Orange
Line, three phase	L3	Blue	Yellow

SESSION 2: ICTP SWITCH AND DISTRIBUTION BOARD

Check Your Progress

SESSION 3: WORKPLACE HEALTH AND SAFETY MEASURES

Check Your Progress