Category Archives: Physics

Write the characteristics on the basis of which duck-biled platypus is considered as a link between reptiles and mammals.

The characteristic resembling reptiles is laying of eggs and the characteristics resembling mammals is presence of mammary glands.

06/03/2012 – 1:38 PM | By Satyam | Posted in Physics | Comments (0)

Why the management of the forest and wildlife resources considered as a challenging task?

04/03/2012 – 8:00 AM | By Satyam | Posted in Physics | Comments (0)

An electrician assembling a household circuit uses a long thick copper wire with green insulation and a short wire made up of copper-tin alloy. What are the two wires called? Mention the importance of each wire in an electric circuit. How are the two wires connected in the circuit?

04/02/2012 – 2:16 PM | By Satyam | Posted in Physics | Comments (0)

An electrician put a fuse rating of 5A in that part of domestic electric circuit in which an electric heater of rating 1.5kW, 220V is operating. What is likely to happen in this and why? What change, if any, needs to be made?

(b) You are given the following current time graphs from two different sources. (i) Name the type of current in two cases. (ii) Identify any one source for each type of these currents. (iii) What is the frequency of current in case II in India? (iv)Use above graphs to write two differences between the current …

04/02/2012 – 2:13 PM | By Satyam | Posted in Physics | Comments (0)

What do you mean by (a) short circuit and (b) overloading? What are the safety precautions taken to avoid these problems in domestic electric circuits?

04/02/2012 – 2:12 PM | By Satyam | Posted in Physics | Comments (0)