Class 7 Science Chapter 10 MCQ (Multiple Choice Questions) of Electric Current and Its Effect with answers and explanation for current academic session 2023-24. 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 2023-24

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

Consider the following statements and choose the correct one:

[A]. Electricity is a form of energy.
[B]. The flow of electricity through a conductor is called electric current.
[C]. Electricity is useful because it can run many appliances in our day-to-day life which make our work easier.
[D]. All the above
Q3

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

[A]. Copper
[B]. Aluminium
[C]. Nichrome
[D]. Tungsten
Q4

The element of an electric iron is made of:

[A]. Iron
[B]. Nickel
[C]. Nichrome
[D]. Tungsten
Q5

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
Q6

An electric fuse works on the:

[A]. Chemical effect of current
[B]. Magnetic effect of current
[C]. Lighting effect of current
[D]. Heating effect of current
Q7

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
Q8

The most suitable material for making the core of an “Electromagnet” is:

[A]. Iron
[B]. Brass
[C]. Aluminium
[D]. Steel
Q9

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.
Q10

Start to your left side, three bulbs A, B, C are connected in a circuit with the help of wire, switch and three cells. There are no defected pieces of anything. If switch is ON position:

[A]. Bulb C will glow first.
[B]. Bulb B and C will glow simultaneously and bulb A will glow after sometime.
[C]. All the bulbs A, B and C will glow at the same time.
[D]. The bulbs will glow in order A, B and C.
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

Which of the following does not work on the heating effect of current?

[A]. Electric bulb
[B]. Miniature circuit breaker
[C]. Electric fuse
[D]. Immersion rod
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

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. The fluorescent tube lights and compact fluorescent lamps do not have filaments.
[B]. Fluorescent tube lights and compact fluorescent lamps do not work on the heating effect of current.
[C]. The fluorescent tube light on lamp contains mercury vapor, which is a kind of gas.
[D]. The fluorescent tube light on lamp contains silver gas, due to these, they are more expensive.
Q19

Due to this, the filament of electric bulb gets heated to a very high temperature and starts glowing:

[A]. Light
[B]. Magnetic field
[C]. Resistance
[D]. Nichrome wire
Q20

Choose the combination of correct answer from the following:

[A]. Circuit is open and no current flows through it .
[B]. Current flows after sometime.
[C]. Circuit starting from positive terminal of the cell stops at the switch and circuit is open.
[D]. All are correct
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

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. An electromagnet is better than a permanent magnet in many respects.
[B]. An electromagnet is a temporary magnet because its magnetism is only for the duration of current flowing in its coil.
[C]. An electromagnet can be made very strong by increasing the number of turns in the coil and by increasing the current passing through the coil.
[D]. All the above
Q23

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
Q24

Consider the following statements and choose the incorrect one(s):

[A]. The electromagnet loses its magnetism for a moment and the armature is no longer attracted by it.
[B]. After getting magnetized the electromagnet attracts the iron armature towards itself.
[C]. When we press the switch, the electric circuit of the bell is completed and the current passes through the coil of the electromagnet and it gets magnetized.
[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.

Download App for Class 7

Help and Support

We are here to help you, if any problem occur during the use of contents of Tiwari Academy website or app. Always feel free to contact us. Our main motive is to help the students without any personal benefit. All the important Questions, MCQs with answers, NCERT Solutions for class 7 science chapter 14 are here to use free.

Last Edited: June 13, 2023