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Physics problems: electricity

Ohm's law and electric circuits

 

 

Problem 65.

The potential difference between the terminals of an electric iron is 240 V and the current is 5.0 A. What is the resistance of the electric iron?

Solution

 

Problem 66.

A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?

Solution

 

Problem 67.

A current of 5 amperes flows through a wire whose ends are at a potential difference of 3 volts. Calculate the resistance of the wire.

Solution

 

Problem 68.

What is the potential difference (voltage) between the ends of a conductor of 16 ohm resistance, when a current of 1.5 A flows through it?

Solution

 

Problem 69.

An electric bulb draws a current of 0.35 A for 20 minutes. Calculate the amount of electric charge that flows through the circuit.

Solution

 

 

 

 

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