F5 chapter 3.1 Current and Potential difference

Diagram (a) shows an electric field pattern and diagram (b) shows an electric field pattern when the distance,d is increases.

• Electrical force increases

• Electrical current increases

• Potential difference increases

• Strength of the electric field decreases

The unit of the charge is

• Watt

• Ampere

• Newton

• Coulomb

A current of 5A flows in a electric lamp. How much of charge passes through the lamp in 4s.

• 10C

• 25C

• 20C

• 9C

When an electrical appliance is turn on for 2 hours, current of 3A flow through it. How many electron flow through the circuit in 2 hours? (e=1.6x10-19C)

• 50V

• 10V

• 1000V

• 500V

Which of the pattern of the electric field is correct?

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Which of the pattern of the electric field is correct?

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Which of the following pattern of electric field is correct?

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What happens when two objects with the same electric charge are brought close together?

• They repel each other

• They attract each other

• Nothing happens

• They neutralize each other

What happens when two objects with opposite electric charges are brought close together?

• They repel each other

• They attract each other

• Nothing happens

• They neutralize each other