ICSE − Q & A

explain pg 164 question 27(IN CONCISE)

Why is it necessary to have an earth wire installed in a power circuit,but not in a ligthning circuit?

+ 1 more questions by utkarsh3107  

If we assume that the earth pin of plug would not be thicker than the two,and we would insert it in live wire socket,what would happen?
asked by Utkarsh Sharma (utkarsh3107) 8 years ago
2

State the condition when the magnitude of force on a current carrying conductor placed in a magnetic field is:
i) zero
ii) maximum.

Ans fr this numerical...

+ 2 more questions by mmks1234  

two ways to increase frequency of a vibrating sting.. i think one is that we can increase the tension in the string...nd the other?
asked by Mohammed Malik Sharaf (mmks1234) 8 years ago
4

how can a permanent magnet be demagnetised?
asked by Mohammed Malik Sharaf (mmks1234) 8 years ago
2

Do we have power of lens?

What happens to the resistance when the length of the wire is doubled and area is halved?

Two metal wires of same material and lengths have radii 1mm and 2mm.
Find the ratio of their resistances.

how to find weight of the ruler

I'm not able to understand the 14th question in examples before the exercise 12 (B) of thermionic emission and radioactivity.

The hammer of an electric strikes 1440 times in a minute and does a work of 0.2J per strike. What is the power of hammer in SI system