A spark plug in a bike or a car is used to ignite the air - fuel mixture in the engine. It consists of two electrodes separated by a gap of around 0.6 mm gap as shown in the figure.

To create the spark an electric field of magnitude `3xx10^(6)Vm^(-1)` is required. (a) What potential difference must be applied to produce the spark ? ( b) If the gap is increased , does the potential defference increase decrease or remains the same the same ? ( c) find the potential difference if the gap is 1 mm .

Explanation

The distance between two electrodes d=0.6 mm `=0.6xx10^(-3)m`
The magnitude of electric field `E=3xx10^(6)Vm^(-1)`
To find:
Potential difference need to produced spark V=?
Formula: `E=(V)/(d)`
`:.V=E.d`
`=0.6xx10^(-3)xx3xx10^(6)`
=1800 V.