By tackling these Class 7 Science MCQ and Electricity Circuits and Their Components Class 7 Science Curiosity Chapter 3 MCQ Online Test with Answers, students will build a solid foundation in the topic.
Class 7 Science Chapter 3 Electricity Circuits and Their Components MCQ
Electricity Circuits and Their Components MCQ
Class 7 Science Chapter 3 MCQ Online Test
Question 1.
Which of the following is way to generate electricity?
(a) By wind energy
(b) By solar energy
(c) By falling water
(d) All of the above
Answer:
(d) All of the above
Question 2.
The light emitting part of a bulb is
(a) Filament
(b) Metal case
(c) Glass bulb
(d) Insulator
Answer:
(a) Filament
Question 3.
In which of the following current will flow’ in an electric circuit?
(a) Wood
(b) Plastic
(c) Copper
(d) Rubber
Answer:
(c) Copper
Question 4.
Which is a conductor among them?
(a) Rubber
(b) Glass
(c) Iron
(d) Plastic
Answer:
(c) Iron
Question 5.
In the L E D.
(a) Positive terminal (Longer wire)
(b) Negative terminal (Shorter wire)
(c) Both (a) and (b)
(d) None of the above
Answer:
(c) Both (a) and (b)
Question 6.
What a broken filament do in a lamp?
(a) Preventing the lamp from glowing
(b) Keep the lamp glow
(c) Stops the flow of current
(d) Both (a) and (c)
Answer:
(d) Both (a) and (c)
Question 7.
When a circuit is closed, then bulb:
(a) does not glow
(b) glows
(c) bursts
(d) emits smoke
Answer:
(b) glows
Question 8.
Which material is mainly used to make electric wires?
(a) Silver
(b) Gold
(c) Rubber
(d) Copper
Answer:
(d) Copper
Question 9.
In which type of energy, electric energy converts generally?
(a) Heat energy
(b) Mechanical energy
(c) Light energy
(d) All of the above
Answer:
(d) All of the above
Question 10.
Which material is insulator?
(a) Aluminium
(b) Copper
(c) Iron
(d) Plastic
Answer:
(d) Plastic
Question 11.
Which metal is used in making bulb filament?
(a) Copper
(b) Iron
(c) Tungsten
(d) Zinc
Answer:
(c) Tungsten
Question 12.
What is used to exhibit electric circuit?
(a) Real image
(b) Symbols
(c) Blue-print
(d) Colours
Answer:
(b) Symbols
Question 13.
What is the direction of current assumed in circuit?
(a) Negative end to positive end
(b) Positive end to negative end
(c) Right to left
(d) Downward to upward
Answer:
(b) Positive end to negative end
Question 14.
Which is of following is a symbol of electric lamp?
Answer:
Question 15.
What is decided by the organisation like
I. E.C., A N S I., I E E E, etc.?
(a) Electric circuit
(b) Standard symbol
(c) Name of electric devices
(d) Units related to electricitv
Answer:
(b) Standard symbol
Electricity Circuits and Their Components Class 7 Fill in the blanks
Question 1.
The _______ supply reaches in our homes and factories via wires.
Answer:
electric
Question 2.
Bulb filament is made up of _______ metal.
Answer:
tungsten
Question 3.
The lamp _______ when circuit is closed.
Answer:
glows
Question 4.
Electric current flow through _______.
Answer:
conductor
Question 5.
In symbol of electric cell long line represents _______ terminal.
Answer:
positive
Question 6.
_______ are used in representation of electric circuit.
Answer:
Symbols
Question 7.
A combination of two cells, in which positive end of one cell is connected with negative end of another cell is called a _______.
Answer:
battery
Question 8.
Unit of electric power is _______.
Answer:
watt
Electricity Circuits and Their Components Class 7 True or False
Question 1.
Rubber is a good conductor. (True/False)
Answer:
False
Question 2.
Bulb does not glow in an open circuit. (True/False)
Answer:
True
Question 3.
Direction of current is assumed from positive end to negative end. (True/False)
Answer:
True
Question 4.
Bulb filament is made up of copper. (True/False)
Answer:
False
Question 5.
Electric energy is only used to emit light. (True/False)
Answer:
False
Electricity Circuits and Their Components Class 7 Match the following
Question 1.
| Column A | Column B |
| (a) Lamp | (i) Conductor |
| (b) Plastic | (ii) Combination of cells |
| (c) Gold | (iii) Filament |
| (d) Battery | (iv) Insulator |
Answer:
| Column A | Column B |
| (a) Lamp | (iii) Filament |
| (b) Plastic | (iv) Insulator |
| (c) Gold | (i) Conductor |
| (d) Battery | (ii) Combination of cells |
Question 2.
Answer:
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