Question

Two electrodes (0.68 mm apart) in your car's spark plug are subject to a 3.5 kV potential difference. What magnitude electric field does this produce in the region between the two electrodes

Answer 1

The magnitude of the electric field produced in the region between the two electrodes is $5.15 \times 10^6 \ V/m$.

Electric field strength

The electric field strength produced in the region between the two electrodes is calculated as follows;

$E = \frac{v}{d}$

where;

• v is the potential difference = 3.5 kV = 3,500 V
• d is the separation distance = 0.68 mm

The electric field strength is calculated as follows;

$E = \frac{3500}{0.68 \times 10^{-3}} \\\\E = 5.15 \times 10^6 \ V/m$

Thus, the magnitude of the electric field produced in the region between the two electrodes is $5.15 \times 10^6 \ V/m$.

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