In which of the following case the bulb will glow: Only one terminal of a cell is joined with a metal wire to one terminal of the bulb. Both terminals of the bulb are joined with two metal wires to one terminal of the cell. One terminal of the cell is joined to one terminal of the bulb and other terminal of the cell to the other terminal of the bulb.

The bulb will glow in case 3 i.e. one terminal of the cell is joined to one terminal of the bulb and other terminal of the cell to the other terminal of the bulb. Here the electric circuit is complete and the current will flows through the circuit.

E M B I B E

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 25

EASY

7th ICSE

IMPORTANT

Earn 100

What is an electric circuit ?

Important Questions on Electricity and Magnetism

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 26

Describe an experiment to show that electricity flows only if the circuit is complete and it does not flow if the circuit is incomplete.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 27

You are provided with a torch bulb, a cell and two plastic coated metal wires. Draw a diagram to show a complete circuit to light the bulb.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 28

In which of the following case the bulb will glow:

Only one terminal of a cell is joined with a metal wire to one terminal of the bulb.
Both terminals of the bulb are joined with two metal wires to one terminal of the cell.
One terminal of the cell is joined to one terminal of the bulb and other terminal of the cell to the other terminal of the bulb.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 29

Distinguish between conductors and insulators of electricity. Give two examples of each.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 30

Select conductors and insulators from the following:
Glass, silver, copper, wood, paper, pure water, impure water, aluminium, iron, leather, plastic, steel, human body and ebonite.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 7 - Electricity and Magnetism>TEST YOURSELF>Q 31

The following diagram shows four circuits A, B, C and D. Each circuit has a cell and a torch bulb. Name the circuits in which the bulb will glow? Give reason to your answer

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