Class 12 Electronics Chapter 1 Electrical Power

Class 12 Electronics Chapter 1 Electrical Power 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 12 Electronics Chapter 1 Electrical Power Question Answer and select need one. Class 12 Electronics Chapter 1 Electrical Power Notes Download PDF. AHSEC Class 12 Elective Electronics Question Answer English Medium.

Class 12 Electronics Chapter 1 Electrical Power

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 12 Elective Electronics Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 12 Electronics Textbook Solutions English Medium for All Chapters, You can practice these here.

Electrical Power

Chapter: 1

Check Your Progress

A. Multiple choice questions:

1. The most efficient way to transmit electrical energy using a transmission line is ________________. 

(a) Increase voltage and current. 

(b) Increase voltage and reduce current. 

(c) Decrease voltage and increase current. 

(d) Decrease voltage and current.

Ans: (b) Increase voltage and reduce current. 

2. Which of the following meter is used to measure the amount of power consumed in residence? 

(a) Voltmeter. 

(b) Ammeter. 

(c) Barometer. 

(d) Energymeter.

Ans: (d) Energymeter.

3. A protecting device used in an electric circuit to protect against electric shock is ________________. 

(a) TPS. 

(b) PROFIBUS.

(c) GFCI. 

(d) GMI.

Ans: (c) GFCI.

4. The voltage rating for medium voltage equipment is ______________. 

(a) 480 volts. 

(b) 1000 volts or less. 

(c) Greater than 1000 to 100,000 volts. 

(d) Greater than 100,000 to 230,000 volts.

Ans: (c) Greater than 1000 to 100,000 volts.

5. The voltage rating for high voltage equipment is ________. 

(a) 480 volts. 

(b) 1000 volts or less. 

(c) greater than 1000 to 100,000 volts. 

(d) greater than 100,000 to 230,000 volts.

Ans: (d) greater than 100,000 to 230,000 volts.

6. The voltage rating for low voltage equipment is ________. 

(a) 480 volts. 

(b) 1000 volts or less. 

(c) greater than 1000 to 100,000 volts. 

(d) greater than 100,000 to 230,000 volts.

Ans: (b) 1000 volts or less. 

7. The voltage rating for extra high voltage equipment is ______________. 

(a) 2,40,000 volts to 8,00,000 volts.

(b) greater than 1000 to 100,000 volts. 

(c) greater than 100,000 to 230,000 volts. 

(d) for 1000 volts or less.

Ans: (a) 2,40,000 volts to 8,00,000 volts.

8. Which of the following units is used for the safety, reliability, flexibility of an electrical system? 

(a) Busway. 

(b) Transformer. 

(c) Load centre. 

(d) Switchgear.

Ans: (c) Load centre.

9. Which of the following units acts as a medium for transmitting electrical signals from one machine to another? 

(a) Transformer. 

(c) Busway. 

(b) Load centre. 

(d) Circuit breaker.

Ans: (c) Busway.

10. The electrical device that converts electrical energy to mechanical energy is called ______________. 

(a) Generator. 

(b) Motor. 

(c) Switch. 

(d) Switchgear.

Ans: (b) Motor.

B. Fill in the blanks:

1. GFCI protects us from ___________ and ___________. 

Ans: Short circuit and ground faults.

2. To protect the load from these sudden fluctuations ___________ is used. 

Ans: Surge arrester.

3. Load centre consists of an enclosure, interior, and ___________. 

Ans: Trim.

4. Three phase transformers are used in ___________ station, transmitting station, and ___________ station of an electrical system. 

Ans: Generating, distributing.

5. A transformer is a ___________ unit. 

Ans: Static.

6. Sudden fluctuation in electric power is called __________. 

Ans: Surge.

7. Coal, oil, and uranium are fuels used to convert water into steam, which in turn drives a ___________. 

Ans: Turbine.

8. GFCI stands for ground ___________ circuit ___________. 

Ans: Fault, interrupter.

9. AFCI stands for ________________ circuit _________. 

Ans: Arc, fault, interrupter.

10. In an electrical system, the unit which performs the operation of routing of power cables, controlling the equipment and safety of individuals is known as ___________.

Ans: Switchgear.

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

1. Armature is the rotating part of a motor or generator. 

Ans: True.

2. A brush is a stationary or fixed part of a generator. 

Ans: False.

3. According to Faraday’s law of electromagnetic induction, whenever a conductor moves in a magnetic field, EMF gets induced across the conductor. 

Ans: True.

4. An AC generator is also known as alternator. 

Ans: True.

5. Circuit breakers provide over current protection of a circuit. 

Ans: True.

6. A generator converts mechanical energy into electrical energy.

Ans: True.

7. Switchgear is used in substation. 

Ans: True.

8. GFCI is designed for protection of a person against electric arc. 

Ans: False.

9. AFCI is designed for protection of a person against electric shock. 

Ans: False.

10. Load centre is a term used for the panel board in industry.

Ans: True.