NCERT Solutions | Class 7 Science Chapter 14 | Electric Current and its Effects

CBSE Solutions | Science Class 7

Check the below NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Pdf free download. NCERT Solutions Class 7 Science were prepared based on the latest exam pattern. We have Provided Electric Current and its Effects Class 7 Science NCERT Solutions to help students understand the concept very well.

NCERT | Class 7 Science

NCERT Solutions Class 7 Science
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	7th
Subject:	Science
Chapter:	14
Chapters Name:	Electric Current and its Effects
Medium:	English

Electric Current and its Effects | Class 7 Science | NCERT Books Solutions

You can refer to MCQ Questions for Class 7 Science Chapter 14 Electric Current and its Effects to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

ncert class 7 science Chapter 14 notes, Question 1.

Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position and battery.

ncert class 7 science Chapter 14 question answer, Answer :

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.1.1

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.1.2

NCERT Science book Class 7 Solutions PDF free download, Question 2.

Draw the circuit diagram to represent the circuit shown in Fig.
byjus class 7 science Chapter 14 Electric Current and its Effects Q.2.1

cbse science class 7 solutions, Answer :

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.2.2

ncert science class 7 book, Question 3.

Figure shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells.
NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.3.1

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.3.1

ncert class 7 science Chapter 14 question answer, Answer :

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.3.2

ncert science class 7 Chapter 14, Question 4.

The bulb in the circuit shown in Fig. does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.
NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.4.1

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.4.1

cbse science class 7 solutions, Answer :

The problem in this circuit is the connection of two cells. Here both the positive terminals of the cells are connected to each other. This must be reversed for anyone cell to make the bulb glow i.e., the positive terminal of one cell should be connected with the negative terminal of the other.
byjus class 7 science Chapter 14 Electric Current and its Effects Q.4.2

byjus class 7 science Chapter 14 Electric Current and its Effects Q.4.2

ncert science class 7 pdf free download, Question 5.

Name any two effects of electric current.

ncert class 7 science Chapter 14 question answer, Answer :

Heating effect.
Magnetic effect.

ncert science class 7 solutions, Question 6.

When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.

cbse science class 7 solutions, Answer :

When an electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of the electric current due to the attraction of the wire. So, the compass needle which is a magnet gets deflected.

ncert science class 7 textbook pdf, Question 7.

Will the compass needle show deflection when the switch in the circuit shown by Fig. is closed?

NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.7

ncert class 7 science Chapter 14 question answer, Answer :

No. Since, there is no cell so, no current will flow.

NCERT Solutions for Class 7 Science, Question 8.

Fill in the blanks:

A longer line in the symbol for a cell represents its ………… terminal.
The combination of two or more cells is called a …………..
When current is switched ‘on’ in a room heater, it ………….
The safety device based on the heating effect of electric current is called a ……….

cbse science class 7 solutions, Answer :

positive battery
battery
becomes red hot
fuse

NCERT Solutions for Class 7 Science Chapter 14, Question 9.

Mark ‘T’ if the statement is true and ‘F’ if it is false:

To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell. (T/F)
When the electric current, through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T/F)
An electromagnet does not attract a piece of iron. (T/F)
An electric bell has an electromagnet. (T/F)

ncert class 7 science Chapter 14 question answer, Answer :

False
True
False
True

science class 7 Chapter 14, Question 10.

Do you think an electromagnet can be used for separating plastic bags from a garbage heap? Explain.

cbse science class 7 solutions, Answer :

No. This is because electromagnets can only attract magnetic materials. The plastic bag is a non-magnetic material and will not be attracted by an electromagnet.

science class 7 pdf, Question 11.

An electrician is carrying out some repairs in your house. He wants to replace a fuse with a piece of wire. Would you agree? Give reasons for your response.

ncert class 7 science Chapter 14 question answer, Answer :

No, we would not agree to replace the fuse with a wire. The electric wire will not melt even if a high current flows through it. So, it will not prevent the damage done by high current.

cbse class 7 science book, Question 12.

Zubeda made an electric circuit using a cell holder shown in the following Fig., a switch, and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.
NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.12

cbse science class 7 solutions, Answer :

One of the reasons may be that the rubber band used in the cell holder may not be tight enough to keep the two cells in contact with each other. If the cells are not in proper contact with each other, then the circuit will not be complete, and the current will not flow through the circuit. Hence, the bulb will not glow. The other reason may be that the two cells are not connected properly. The negative terminal of one cell must be connected to the positive terminal of the other cell.

cbse class 7 science Chapter 14, Question 13.

In the circuit shown in the following Fig.:
NCERT Solutions for Class 7 Science Chapter 14 Electric Current and its Effects Q.13

Would any of the bulbs glow when the switch is in the ‘OFF’ position?
What will be the order in which the bulbs A, B, and C will glow when the switch is moved to the ‘ON’ position?

ncert class 7 science Chapter 14 question answer, Answer :