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NCERT solutions for Class 7 Science chapter 14 - Electric Current and Its Effects

Science Textbook for Class 7

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Chapters

NCERT Science Class 7

Science Textbook for Class  7

Chapter 14: Electric Current and Its Effects

Chapter 14: Electric Current and Its Effects solutions [Pages 170 - 172]

Q 1 | Page 170

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

Q 2 | Page 170

Draw the circuit diagram to represent the circuit shown in figure.

Q 3 | Page 170

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.

Q 4 | Page 170

The bulb in the circuit shown in Figure does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.

Q 5 | Page 170

Name any two effects of electric current.

Q 6 | Page 171

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

Q 7 | Page 171

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

Q 8.1 | Page 171

Fill in the blanks:

Longer line in the symbol for cell representsits_________terminal.

Q 8.2 | Page 171

Fill in the blanks:

The combination of two or more cells is called a _________.

Q 8.3 | Page 171

Fill in the blanks:

When current is switched ‘on’ in a room heater, it __________

Q 8.4 | Page 171

Fill in the blanks:

The safety device based on the heating effect of electric current is called a _________.

Q 9.1 | Page 171

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)

  • True

  • False

Q 9.2 | Page 171

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

When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. (T/F)

  • True

  • False

Q 9.3 | Page 171

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

An electromagnet does not attract a piece of iron. (T/F)

  • Ture

  • False

Q 9.4 | Page 171

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

An electric bell has an electromagnet. (T/F)

  • True

  • False

Q 10 | Page 171

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

Q 11 | Page 171

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

Q 12 | Page 171

Zubeda made an electric circuit using a cell holder shown in Figure, 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.

Q 13 | Page 172

In the circuit shown in figure

1) Would any of the bulbs glow when the switch is in the ‘OFF’ position?

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

Chapter 14: Electric Current and Its Effects

NCERT Science Class 7

Science Textbook for Class  7

NCERT solutions for Class 7 Science chapter 14 - Electric Current and Its Effects

NCERT solutions for Class 7 Science chapter 14 (Electric Current and Its Effects) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Science Textbook for Class 7 solutions in a manner that help students grasp basic concepts better and faster.

Further, we at shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 7 Science chapter 14 Electric Current and Its Effects are Symbols of Electric Components, Heating Effect of Electric Current, Magnetic Effect of Electric Current, Concept of Electromagnet, Concept of Electric Bell.

Using NCERT Class 7 solutions Electric Current and Its Effects exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 7 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 14 Electric Current and Its Effects Class 7 extra questions for Science and can use shaalaa.com to keep it handy for your exam preparation

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