GCSE Physics

The ammeter reads 0.5 amps.

A 2 ohm resistor* is twice as resistant as a 1 ohm resistor, so it is twice as hard for the current* to flow. The resistor allows half of the 1 amp current to pass.

By Ohm's Law:

V = IR

Solving for I:


Now replacing the symbols with the values given:


0.5 = I

I = 0.5 amps

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