A piec of paper wrapped tightly on a wooden rod is found to get charged quickly when held over a flame compared to similar piece when wrapped on a brass on a brass rod This is because .

A piece of paper wrapped tightly on a wooden rod is found to get charged quickly when held over a flame compared to a similar piece of paper when wrapped on brass rod . Explain why ?

(i) A poor emitter has a large reflectivity . Explain why. (ii) A copper tumbler feels much colder than a wooden block on a cold day. Explain why. (iii) The earth would become so cold that life is not possible on it in the absence of the atmosphere. Explain why? (iv) Why clear nights are cooler than cloudy nights? Why does a piece of red glass when heated and taken out glow with green light? (vi) Why does the earth not become as hot as the sun although it has been receiving heat from the sun for ages? (vii) Animals curl into a ball when they are very cool. Why? (viii) Heat is generated continuously in an electric heater but its temperature becomes constant after some time. Explain why? (ix) A piece of paper wrapped tightly on a wooden rod is observed to get charred quickly when held over a flame as compared to a similar piece of paper when wrapped on a brass rod. Explain why? (x) Liquid in a metallic pot boils quickly whose base is made black and rough than in a pot whose base is highly polished . Why?

Explain why a piece of paper warpped tightly on a wooden rod is found to gets charred qucikly.

A thin paper cup filled with water does not catch fire when placed over a flame. This is because

When a comb rubbed with dry hair attracts pieces of paper. This is because the

Why does a charged glass rod attract a piece of paper ?

when a glass rod is rubbed with silk cloth, both get charged.

Why does a charged glass rod attract a piece of paper?