Advertisements
Advertisements
Question
Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.
Advertisements
Solution
It is not safe for an electrician to repair the main line electrical wires during heavy rains because rainwater contains many impurities. Salt is present in it as impurities. Due to this, it becomes a good conductor of electricity, i.e., electricity starts flowing in it. This can be fatal for the electrician, and if an electrician does this during heavy rains, he may get an electric shock.
APPEARS IN
RELATED QUESTIONS
Most liquids that conduct electricity are solutions of ________, _______ and ________.
The bulb does not glow in the setup shown in figure list the possible reasons. Explain your answer.
A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that ______.
Does pure water conduct electricity? If not, what can we do to make it conducting?
In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.
A child staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Can you explain the reason?
Paheli had heard that rainwater is as good as distilled water. So, she collected some rain water in a clean glass tumbler and tested it using a tester. To her surprise, she found that the compass needle showed deflection. What could be the reasons?
Which one of the following solutions will not conduct electricity?
Observe the following circuit given in the figure.
Current does not flow in the circuit, if there is a gap between the two wires. Does it indicate that air is a poor conductor of electricity? Does air never conduct electricity? Explain.
Boojho made the circuit as shown in the figure. He wanted to observe what happens when an electric current is passed through water. But he forgot to add a few drops of lemon juice to water. Will it make any difference to his observations? Explain.
