Practicing Class 7 Science MCQ and Class 7 Science Chapter 3 Electricity Circuits and Their Components MCQ Questions Online Test with Answers daily helps in time management.
Class 7 Electricity Circuits and Their Components MCQ with Answers
MCQ on Electricity Circuits and Their Components Class 7
Class 7 Science Chapter 3 Electricity Circuits and Their Components MCQ Questions with Answers
Question 1.
An example of an insulator is:
(a) Copper wire
(b) Rubber
(c) Steel spoon
(d) A filament
Answer:
(b) Rubber
Question 2.
Which of the following is NOT an insulator?
(a) A plastic scale
(b) A cotton thread
(c) A glass tumbler
(d) A metal coin
Answer:
(d) A metal coin
Question 3.
Which of the following is a source of electric current?
(a) An electric switch
(b) A lamp
(c) An electric cell
(d) A copper wire
Answer:
(c) An electric cell
Question 4.
An electric switch is used:
(a) to make or break the circuit as required
(b) as an insulating material
(c) as a source of electric current
(d) as a glowing device
Answer:
(a) to make or break the circuit as required
Question 5.
An electric lamp emits light when a glows on passing electricity.
(a) glass case
(b) terminal
(c) filament
(d) metal case
Answer:
(c) filament
Question 6.
An object is called a conductor of electric current if:
(a) it stops the flow of electric current through it
(b) it does not form a part of the electric circuit
(c) it keeps the two terminals of a lamp apart
(d) it allows electric current to pass through it
Answer:
(d) it allows electric current to pass through it
Electricity Circuits and Their Components Class 7 Assertion-Reason Type Questions
Assertion-Reason Questions Directions:
Each of the questions (i) and (ii) contain two statements – first ‘Assertion’ and second ‘Reason’. Select the correct answer to these question from the codes (a) , (b), (c) or (d) as given below:
(a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) Both Assertion and Reason are true and Reason is NOT the correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(i) Assertion (A): Copper wires covered with plastic or rubber coatings are used as conducting wires in electric wiring.
Reason (R): Copper is a good conductor of electricity and plastic or rubber are insulators or bad conductors of electricity. The outer covering of conducting wires save us from short circuits or electric shocks.
Answer:
(a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(ii) Assertion (A): An electric switch is not a necessary component of the electric circuits so it must be avoided in circuits to save electricity.
Reason (R): An electric switch is used to make or break the circuit when required.
Answer:
(d) Assertion is false and Reason is true.
Electricity Circuits and Their Components Class 7 Fill in the blanks
1. The top metal tip of an electric cell is its ___________ terminal.
Answer:
Positive
2. A thin coiled wire inside an electric lamp is a ___________ that glows when electric current passes through it.
Answer:
Filament
3. A torch has a ___________ in its bottom lid that keeps the cells connected to the lamp.
Answer:
Spring
4. ___________ is a material that allows electricity to pass through it.
Answer:
Conductor
5. An electric ___________ is a complete pathway for the electric current to pass through.
Answer:
Circuit
6. The ___________ from the ends of conducting wires needs to be removed to connect these wires in a circuit.
Answer:
Insulating covering
Electricity Circuits and Their Components Class 7 True or False
Question 1.
An insulator does not allow the electric current to pass through it.
Answer:
True
Question 2.
Electric current flows only when the cell is connected to a switch.
Answer:
False
Explanation:
Switch in the circuit only makes or breaks the circuit when required
Question 3.
Electricity from an electric cell is dangerous if used with naked hands.
Answer:
False
Explanation:
current of an electric cell is weak and cannot be dangerous
Question 4.
A lamp with a broken filament is a fused lamp.
Answer:
True
Explanation:
broken filament does not glow as it breaks the electric circuit
Question 5.
If we remove insulating covering from ends of conducting wires, these will stop conducting electricity.
Answer:
False
Explanation:
metal wires inside the coverings conduct electric current
Question 6.
An electric switch in “off’ position eases the flow of electric current.
Answer:
False
Explanation:
an electric switch in OFF position stops the flow of electric current
Electricity Circuits and Their Components Class 7 Match the following
Question 1.
Match the following items given in Column A with that in Column B:
| Column A | Column B |
| 1. Conductor | (a) Filament |
| 2. Makes or breaks an electric circuit when required | (b) Copper wire |
| 3. Part of a lamp that glows on passing electricity | (c) Plastic scale |
| 4. Insulator | (d) Rubber eraser |
| 5. Production of electricity from stored chemicals | (e) Electric switch |
| (f) Electric cell | |
| (g) Coin |
Answer:
| Column A | Column B |
| 1. Conductor | (b) Copper wire |
| (g) Coin | |
| 2. Makes or breaks an electric circuit when required | (e) Electric switch |
| 3. Part of a lamp that glows on passing electricity | (a) Filament |
| 4. Insulator | (c) Plastic scale |
| (d) Rubber eraser | |
| 5. Production of electricity from stored chemicals | (f) Electric cell |
Question 2.
Match the following items given in Column A with that in Column B:
| Column A | Column B |
| 1. LED or Incandescent | (a) An electric circuit |
| 2. An electric circuit diagram | (b) Electric cell |
| 3. The path provided to electricity to flow through an electric wire or a device | (c) Plastic or rubber |
| 4. A portable source of electric current | (d) Electric lamp |
| 5. Conducting wires are covered with | (e) Uses symbols |
Answer:
| Column A | Column B |
| 1. LED or Incandescent | (d) Electric lamp |
| 2. An electric circuit diagram | (e) Uses symbols |
| 3. The path provided to electricity to flow through an electric wire or a device | (a) An electric circuit |
| 4. A portable source of electric current | (b) Electric cell |
| 5. Conducting wires are covered with | (d) Electric lamp |