Chapter 18, Problem 17Q

To determine

To explain:

When we switch on an electric appliance, kept outside, why it becomes more dangerous in comparison to the situation if the appliance is kept inside and operated wearing shoes with thick soles?

Answer to Problem 17Q

Solution:

It is because when outside, the probability of electric shock increases and it is reduced when the electric appliance is operated inside wearing shoes with thick soles

Formula used:

  •The current is defined as,

$I=\frac{q}{t}$

Explanation of Solution

Human body works as a conducting path to the electrons and the earth is assumed to be a big source and sink of electrons, but the potential of earth is taken to be zero. Now, when an electric appliance is kept outside, there may exist, some moisture due to atmospheric humidity or fog etc. on the switch. When we try to switch on the appliance with bare feet, the charges from the switch of the appliance may take the path from our finger to the earth, through our body and we will have to face an electric shock.

Whereas, when the electric appliance is kept inside, the possibility of moisture is heavily reduced and by wearing shoes with thick soles, the conducting path to flow to earth is interrupted. Thus, even if some moisture is there on the switch, the electrons will not obtain the complete path and thus we will be saved from experiencing an electric shock.