Match the following Column A Column B (a). Human body (1). electric bell (b). Silk thread (2). current (c). Charge in motion (3). conductor (d). Soft iron (4). electromagnet (e). Electromagnet (5). insulator

(a). Human body (3). conductor Human body is a conductor of electric current. Conductors are the materials which allows the electric current to pass through them. (b). Silk thread (5). insulator Silk thread is an insulator. There are no free electrons are there in the silk thread. Hence, it does not conduct electricity. (c). Charge in motion (2). current Charge in motion is called current. In metals the flow of electrons is called current. Its SI unit is ampere. (d). Soft iron (4). electromagnet The core of an electromagnet is a soft iron piece on which a coil of insulated copper wire is wound. It is a temporary magnet. (e). Electromagnet (1). electric bell Electromagnet is used in electric bell. Electromagnet behaves like a magnet when current passes through it. Column A Column B (a). Human body (3). conductor (b). Silk thread (5). insulator (c). Charge in motion (2). current (d). Soft iron (4). electromagnet (e). Electromagnet (1). electric bell

MEDIUM

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What is the reason behind lemon juice to conduct electricity.

Important Questions on Chemical Effects of Electric Current

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Distilled water is _____ of the electricity.

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What are conductors? Give two examples.

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Distillation gives the purest form of water. Why do you think distillation is not used to get drinking water?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Which wire having low resistance or high resistance can be used for connecting various components in an electrical circuit?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Electrolytes conduct electricity due to the movement of

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Match the following

Column A	Column B
(a). Human body	(1). electric bell
(b). Silk thread	(2). current
(c). Charge in motion	(3). conductor
(d). Soft iron	(4). electromagnet
(e). Electromagnet	(5). insulator

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Pure liquids can be _____ (good / poor) conductors of electricity.

HARD

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

What is distilled water? What is it used for?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Paheli had heard that rainwater is as good as distilled water. So, she collected some rainwater in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Which energy transformation occurs during magnetic effect of current?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

A child staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Can you explain the reason?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

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.

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Does pure water conduct electricity? If not, what can we do to make it conducting?

EASY

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

On which effect of current, electric bell is based?

MEDIUM

Science>Physics>Chemical Effects of Electric Current>Liquids Conduct Electricity

Name three liquids, which when tested in the manner shown in figure, may cause the magnetic needle to deflect.

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