Tag: physics
Questions Related to physics
Choose the incorrect option: Expansion during heating:
A coil and a bulb are connected in series with a $12$ volt direct current source. A soft iron core is now inserted in the coil. Then
Appliances based on heating effect of current work on
Fill in the blank.
An appliance / machine which does not use an electric motor is
A copper voltameter is connected in series with a coil of resistance $10 \Omega $. When a steady current is passed through the circuit, $0.297 g$ of copper is found to be deposited at the cathode in $15 min$. The electrochemical equivalent of copper is $3.3 \times 10^{-7} kg C^{-}$. Heat liberated in the coil is:
Rate of dissipation of Joules heat in resistance per unit volume is (symbols have usual meaning)
The essential requirements for a good heating element are _________________.
If the current is flowing through a $10 \Omega$ resistor, then in which case the maximum heat will be generated?
What is CFL ?