Question Text
Question 1 :
To protect an instrument from external magnetic field, it is put inside an iron box.
Question 6 :
What energy conversion does take place in a generator when it is in use?
Question 7 :
The law of electromagnetic induction has been used in the construction of
Question 8 :
A given resistor cannot carry currents exceeding20 A, without exceeding its maximum power dissipation ratings. By forced aircooling suppose that we increase the rate at which heat can be carried by afactor of 2. Now the maximum current that the resistor can carry is
Question 11 :
The most important safety method used for protecting homeappliances from short circuiting or overloading is<br>
Question 12 :
A long solenoid has 200 turns per cm and carries a current i.The magnetic field at its centre is $6.28\times 10^{-2}Wb/m^{2}$. Another long solenoid has 100 turns per cm and it carries a current i/3.The value of magnetic field at its centre is:<br/>
