**Contents**show

## What are the 3 factors of current electricity?

To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges.

## What two factors does current depend on and what are their units?

IN a simple circuit supply voltage and Resistance determines the current.

## What affects a current?

In a closed electric circuit, resistance of the components and the voltage of power source are affecting the electric current. Current is the rate of flow of electrons.

## What affects the current in a circuit?

The current in a circuit is directly proportional to the electric potential difference impressed across its ends and inversely proportional to the total resistance offered by the external circuit. The greater the battery voltage (i.e., electric potential difference), the greater the current.

## What are the factors on which the heat produced by an electric current depends how does it depend on these factors name the law?

Heat produced by an electric current depends on the following factors: (i) Heat produced is directly proportional to square of current. (ii) Heat produced is directly proportional to resistance. (iii) Heat produced is directly proportional to the time for which current flows.

## What factors does the amount of heating in an electric conductor by electric current depends on?

The resistance of the conductor. A higher resistance produces more heat. The time for which the current flows. The longer the time the amount of heat production is high.

## What are two factors that affect the strength of the current in a circuit and how do they affect it?

length – longer wires have greater resistance. thickness – smaller diameter wires have greater resistance. temperature – heating a wire increases its resistance.

## What variables affect current?

You have discovered that voltage and resistance both have an effect on the current flowing in a circuit. Other factors being constant, an increase in voltage results in an increase in current. On the other hand, an increase in resistance results in a decrease in current.