Question

Lightning is a spectacular example of electric current in a natural phenom
much variability to lightning bolt, but a typical event can transfer 10 J of energy a
potential difference of 5 x 10^7 V during a time interval of about 0.2 sec . using this information to estimate following :
1) the total amount of charge transferred between cloud and ground.
2) The current in the lightning bolt
3) The average power delivered over 0.2 sec.​

Answer 1

Answer:

Bhai pta nhi lenghthee qustn hai man nhi KR rha

Answer 2

(1) The total amount of charge transferred between cloud and ground $Q = 4 \times 10^{-7}$ C

(2) The current in the lighting bolt $I = 20 \times 10^{-7}$ A

(3) The average power delivered in 0.2 sec $P = 100$ W

Explanation:

Given :

Energy $(U) =$ 10 J

Potential difference $(V) = 5 \times 10^{7}$ V

Time interval $(t) =$ 0.2 sec.

(1)

The energy stored in terms of charge and potential is given by,

  $U = \frac{1}{2} QV$

  $Q = \frac{2U}{V}$

  $Q = \frac{2 \times 10}{5 \times 10^{7} }$

  $Q = 4 \times 10^{-7}$C

(2)

The current is equal to the charge per unit time.

   $I=\frac{Q}{t}$

  $I = \frac{4 \times 10^{-7}}{0.2}$

  $I = 20 \times 10^{-7}$

(3)

We know that,

$P = VI$

Put value of potential and current from above data.

$P = 20 \times 10^{-7} \times 5 \times 10^{7} = 100$ W