A spark is generated in an automobile spark plug when there is an electric potential of 3000 V across the electrode gap. If 60 W of power is

Question

A spark is generated in an automobile spark plug when there is an electric potential of 3000 V across the electrode gap. If 60 W of power is generated in a single spark that delivers a total charge of 3 nC, how long does it take for the spark to travel across the gap?
A. 50 ns
B. 75 ns
C. 125 ns
D. 150 ns
E. 225 ns 5

in progress 0
Thiên Di 5 years 2021-08-10T00:02:08+00:00 1 Answers 14 views 0

Answers ( )

  1. yenoanh
    0
    2021-08-10T00:03:23+00:00
    Reply

    Answer:

    The correct option is  d

    Explanation:

    From the question we are told that

         The  electric potential is  V = 3000 \ V

          The  power is  P = 60 \ W

          The  charge delivered is  q = 3nC = 3.0 *10^{-9} \ C

    Generally the power generated is mathematically represented as

             P = I V

    =>      I = \frac{P}{V }

    =>       I = \frac{60 }{3000 }

    =>     I = 0.02 \ A

    This  current flow is mathematically represented as

               I = \frac{q -q_o}{\Delta t }

    Where q_o is the charge delivered at t=0 s which is 0s

         So

                 0.02 = \frac{ (3.0 *10^{-9}) -0 }{t - 0 }

                   t = 1.50 *10^{-7 } \ s

                   t = 150 *10^{-9 } \ s

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )