SEBA Class 7 Science Chapter 2 Electricity Electrical Circuit and Their Components

SEBA Class 7 Science Chapter 2 Electricity Electrical Circuit and Their Components Solutions English Medium As Per SCERT New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 7 Science Chapter 2 Electricity Electrical Circuit and Their Components Notes and select need one. SEBA Class 7 Science Textual Notes Download PDF. SCERT Class 7 Science New Textbook Question Answer in English.

SEBA Class 7 Science Chapter 2 Electricity Electrical Circuit and Their Components

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. SCERT Class 7 Amar Bijnan (Science) Textual Solutions are part of All Subject Solutions. Here we have given SCERT Class 7 Amar Bijnan (Science) Question Answer for All Chapters, You can practice these here.

Electricity Electrical Circuit and Their Components

Chapter: 2

PART – I

EXERCISES

1. Darken the circle of correct answers.

(i) Which one of the following will allow electric current to pass through it?

(a) Matchstick.

(b) Plastic comb.

(c) Eraser.

(d) Iron nail.

Ans: (d) Iron nail.

(ii) What is the name of the device that is used to either break or complete an electric circuit?

(a) Conductor.

(b) Switch.

(c) Current.

(d) Terminal.

Ans: (b) Switch.

(iii) Which of the following is an insulator?

(a) Copper.

(b) Mercury.

(c) Glass.

(d) Gold.

Ans: (c) Glass.

(iv) Which metal is used to make the filament of the bulb?

(a) Lead.

(b) Gold.

(c) Copper.

(d) Tungsten.

Ans: (d) Tungsten.

(v) What is the name of the circuit when the switch in an electric circuit is in the ‘OFF’ position?

(a) Closed circuit.

(b) Short circuit.

(c) Open circuit.

(d) None of these.

Ans: (c) Open circuit.

(vi) What is the name of the circuit when the switch in an electric circuit is in the ‘ON’ position?

(a) Short circuit.

(b) Closed circuit.

(c) Open circuit.

(d) None of these.

Ans: (b) Closed circuit.

2. Fill in the blanks:

(i) The combination of two or more cells is called a ______________.

Ans: The combination of two or more cells is called a battery.

(ii) Our body is a __________ of electricity.

Ans: Our body is a conductor of electricity.

(iii) An electric cell has ___________ terminals.

Ans: An electric cell has two terminals.

(iv) Electricity will only flow in an __________ circuit.

Ans: Electricity will only flow in an closed circuit.

(v) Materials that allow electricity to pass through them are called _________.

Ans: Materials that allow electricity to pass through them are called conductors.

(vi) Materials that do not allow electricity to pass through them are called ____________.

Ans: Materials that do not allow electricity to pass through them are called insulators.

(vii) The thin wire that produces light after glowing in the centre of the bulb is known as __________.

Ans: The thin wire that produces light after glowing in the centre of the bulb is known as filament.

(viii) Electric __________ is a path along which electricity flows.

Ans: Electric circuit is a path along which electricity flows.

(ix) A ___________ is a device used to determine whether a substance is a conductor or an insulator of electricity.

Ans: A conduction tester is a device used to determine whether a substance is a conductor or an insulator of electricity.

3. State whether the following statements are true (T) or false (F).

(i) The metal cap in an electric cell is the positive terminal.

Ans: True.

(ii) A circuit diagram uses standard symbols for electric components.

Ans: True.

(iii) A group of battery is called a cell.

Ans: False.

(iv) Insulators allow electric current to pass through them.

Ans: False.

(v) An electric bulb has one terminal.

Ans: False.

(vi) A circuit in which the path of electric current is broken is called an open circuit.

Ans: True.

(vii) Plastic is a good conductor of electricity.

Ans: False.