 Series Circuits

Complete these sentences:

A current will flow through an electrical component (or device) only if there is a or potential difference (p.d.), across its ends. The bigger the potential difference across a component, the the that flows through it.  Components resist a current flowing through them. The bigger their , the smaller the produced by a particular voltage.

The p.d. across a component in a circuit is measured in (V) using a connected across the component.

The current flowing through a component in a circuit is measured in (A) using an connected in with the component.

Resistors in series:

Match each combination of resistors with it's equivalent series resistor:

 a 8W                   2W a b c d 12W b 5W                 6W a b c d 11W c 2W       3W         4W a b c d 10W d 8W      2W        2W a b c d 9W Look at this series circuit.

If the ammeter on the right reads 3A - how would the ammeter on the left compare?  .

This is because:

The Voltmeter labeled A reads 6V.

If the two resistors are equal what must voltmeter B read?    This is because:

In a series circuit:

• the current flows through each component.

• the total of the supply is shared between the components.

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