Class 7 Science Chapter 10 MCQ (Multiple Choice Questions) of Electric Current and Its Effect with answers and explanation for current academic session 2025-26. All the questions are important for exams. In all subjects MCQs are asked in question papers. All the topics are covered in the form of objective MCQs with answer and explanation. Students are required to study the chapter and go through these objective MCQ tests to be confident in exams.

Class 7 Science Chapter 10 MCQ for 2025-26

Class: 7Science
Chapter: 14Electric Current and Its Effect
Contents:MCQ Onlne Test with Answers

MCQ Tests with Answers for Class 7 Science Chapter 14

Q1

At the time of short circuit, the current in the circuit:

[A]. Reduce substantially
[B]. Does not change
[C]. Increase heavily
[D]. Varies continuously
Q2

The filament of an electric bulb is made of a thin wire of:

[A]. Copper
[B]. Aluminium
[C]. Nichrome
[D]. Tungsten
Q3

Read the following sentences carefully, and choose the incorrect one:

[A]. Electricity is produced at power stations.
[B]. From the power stations, electricity is brought to our homes through thick wires atop tall electric poles.
[C]. Though electricity is very useful but it can also be very dangerous.
[D]. None of the above
Q4

When electric current is passed through the filament of a bulb, it gives off:

[A]. Sound and heat
[B]. Heat and magnetism
[C]. Heat and light
[D]. Light
Q5

Read the following sentences carefully, and choose the incorrect one:

[A]. Electric current is actually a flow of charged particles called electrons in a conductor.
[B]. A cell or battery is a source of electric current but this current not flow out on its own.
[C]. A continuous conducting path between the two terminals of a cell of battery along which an electric current flow, is called a circuit.
[D]. None of the above
Q6

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. A cell having a positive terminal and negative terminal.
[B]. If we open the switch, so that it comes in the off position, then a gap is created between the two end of the copper wire or connecting wires.
[C]. When the switch in the circuit is closed, then the switch is said to be in the on position.
[D]. None of the above
Q7

Which of the following statement is or are incorrect?

[A]. When the switch in the circuit is open, then the switch is said to be in the off-position.
[B]. Sometimes the bulb does not light up or glow even when the switch is in the on position or closed.
[C]. The positive terminal of one cell is joined to the negative terminal of the other cell.
[D]. The symbol for representing a battery for three cells will have four pairs of long and short parallel lines connected to one another.
Q8

Circuit Breaker Device which can be used in place of fuse in domestic electric wiring is called:

[A]. CBD
[B]. DCB
[C]. MCD
[D]. MCB
Q9

Nichrome wire is used in:

[A]. CFL
[B]. Electric fuse
[C]. Hair dryer
[D]. MCB
Q10

Choose the statement which is not correct in the case of an electric fuse:

[A]. Fuses are inserted in electric circuits of all buildings.
[B]. There is a maximum limit on the current which can safely flow through the electric circuits.
[C]. There is a minimum limit on the current which can safely flow in the electric circuits.
[D]. If a proper fuse is inserted in a circuit it will blow off if current exceeds the safe limit.
Q11

In a filament type bulb, a lot of electric energy is wasted in the form of:

[A]. Magnetism
[B]. Sound
[C]. Light
[D]. Heat
Q12

The sound produced in a door bell is due to the:

[A]. Chemical effect of current
[B]. Heating effect of current
[C]. Magnetic effect of current
[D]. Sound effect of current
Q13

An MCB which cuts off the electricity supply in domestic circuit in case of short circuiting and overloading works on the:

[A]. Chemical effect of current
[B]. Heating effect of current
[C]. Magnetic effect of current
[D]. Lighting effect of current
Q14

The magnetic effect of electric current was discovered by:

[A]. Maxwell
[B]. Darwin
[C]. Oersted
[D]. Newton
Q15

The compact fluorescent electric lamp has:

[A]. Nichrome filament
[B]. Chromium filament
[C]. Tungsten filament
[D]. No filament
Q16

A fuse wire is made of:

[A]. Cu and Pb
[B]. Pb and Sn
[C]. Al and Sn
[D]. Pb and Al
Q17

Electric current can produce effects

[A]. Heating effect
[B]. Magnetic effect
[C]. Chemical effect
[D]. All the above
Q18

In a science quiz competition, Ankital are asked a question where she had to choose the statement which was/were incorrect?

[A]. A group of cells joined in series is called a battery.
[B]. When the positive terminal of one cell is joined with the negative terminal of the other cell, then the cells are said to be joined in series.
[C]. A diagram which tells us how the various components in a circuit have been connected by using the electrical symbols of the components, is called a circuit diagram.
[D]. None of the above
Q19

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. A fuse works on the heating effect of current.
[B]. A fuse consists of a short length of a thin, tin-plated copper wire having low melting point.
[C]. A fuse is a safety device which prevents electric fires and damage to electrical appliances due to excessive flow of current.
[D]. None of the above
Q20

Which of the following statement is or are correct?

[A]. The touching of live-wire and neutral wire directly is known as short circuit.
[B]. When a short circuit or overloading occurs, the fuse wire blows out cutting off the electricity supply.
[C]. The flow of excessive current and torn wire in the household circuit is the other reason for the short circuit.
[D]. All the above.
Q21

Tanupriya is writing some statements, choose the incorrect statement and help her:

[A]. MCB stand for miniature circuit breaker.
[B]. MCB works on the magnetic effect of current.
[C]. MCB does not work on the heating effect of current.
[D]. None of the above
Q22

Which of the following statement is or are incorrect?

[A]. The magnetic effect of current was discovered by scientist named Hans Christian Oersted.
[B]. When electric current passes through a wire, the current-carrying wire behaves like a magnet.
[C]. It is this magnetic field produced by the current carrying wire which exerts of force on the compass needle and deflects it.
[D]. None of the above
Q23

Read the following sentences carefully, and choose the incorrect one:

[A]. An electromagnet works on the magnetic effect of current.
[B]. Only iron is used for making electromagnets.
[C]. The magnetism of an electromagnet remains as long as the current is flowing in its coil.
[D]. The steel is also used for making electromagnets.
Q24

Vishvas is doing his homework which is given by his teacher. Would you help him to choose the incorrect sentences?

[A]. The electric bell works on the heating and magnetic effect of current.
[B]. The electric bell has a U-shaped electromagnet.
[C]. The electric bell uses an electromagnet to pull that clapper on to a metal bell called gong.
[D]. None of the above
Q25

Which of the following precautions need not to be taken while using electric gadgets or appliances or circuit?

[A]. We should never touch a lighted electric bulb connected to the mains.
[B]. We should never do experiment with the electric Supply from the mains or a generator or an inverter.
[C]. We should never use just any wire or strip of metal in place of a fuse.
[D]. We should never turn the switch in ON position.

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Last Edited: June 13, 2023