Why is it said that the body of a person who gets an electric shock should be massaged well?

If a person standing on the earth touches a phase line , will she get an electric shock ? Why ?

When an animal touches an .electric-fence. the ani mal gets a shock by completing an electrical circuit.When a bird perches on the electric fence, the bird will not get a shock. Why?

There is a murder, which shocked the entire town. The dead body contain the blood smear of other person. The police suspected two persons. Name the method used to identify the murderer.

A merchant plans to sell twó types of personal computers - a desktop model and a portable model that, will cost Rs 25000 and Rs. 40000 respectively. He estimates that the total monthly demand of computers will not exceed 250 units. Determine the number of units of each type of computers which the merchant should stock to get maximum profit if he does not want to invest more than Rs 70 lakhs and if his profit on the.desktop model is Rs 4500 and on portable model is Rs 5000 .

When an animal touches an .electric-fence. the ani mal gets a shock by completing an electrical circuit.How much charge passes through the animal, if it receives a current pulse of 20mA for 0.1 seconds.

More force is required to push a body than pull to get same speed on a ground with same friction. Why?

(a) Explain the meaning of the statement electric charge of a body is quantised. (b) Why can one ignore quantisation of electric charge when dealing with macroscopic ie. Large scale charges?

a. A comb run through one's dry hair attracts small bits of paper. Why? What happens if the hair is wet or if it is a rainy day? (Remember, a paper doesn't conduct electricity.) b. Ordinary rubber is an insulator. But special rubber tyres of aircraft are made slightly conducting. Why is this necessary? c. Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion. Why? d. A bird perches on a bare high power line, and nothing happens to the bird. A man standing on the ground touches the same line and gets a fatal shock. Why?