[1 Mark Question Answer]

Question 11 Mark

Draw a circuit diagram for a bulb connected to a cell with a switch. Mark arrow in the diagram to indicate the direction of flow of current.

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Question 21 Mark

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.

Answer

Conductors — Silver, copper, impure water, aluminum, iron, steel, human body.
Insulators — Glass, wood, paper, pure water, leather, plastic and ebonite.

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Question 31 Mark

How will you test whether a given rod is made of iron or not?

Answer

Bring a magnet near the rod if the rod is attracted by the magnet then it will be made of iron else not.

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Question 41 Mark

What is an electric circuit ?

Answer

For a smooth flow of electric current, a complete circuit is needed. This is known as electric circuit.

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Question 51 Mark