A spark plug in a car has electrodes separated by a gap of 0.027 in. To create a

Question

A spark plug in a car has electrodes separated by a gap of 0.027 in. To create a spark and ignite the air-fuel mixture in the engine, an electric field of 3.8 ? 106 V/m is required in the gap.

(a) What potential difference must be applied to the spark plug to initiate a spark?
________kV

(b) If the separation between electrodes is decreased, does the required potential difference increase, decrease, or stay the same? Explain why.

__________

(c) Find the potential difference for a separation of 0.087 in.
_______ kV

Explanation / Answer

here

gap =  0.027 in = 0.06858 cm

then

A)

as E = V/d

V = 3.8*10^6 * 0.06858*10^-2

V = 2.61 kV

B)

as V is proporational to distance , if distance decreses

the required potential difference decreses

c)

V = E * d

V = 3*10^6 * 0.087 * 0.0254

V = 8.4 kV

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.