The unit of electric current,$.......$,is also called an ampere,named after André-Marie Ampère.

State which has a higher resistance,a $50 \, W$ or a $25 \, W$ lamp bulb,and by how many times?

What can be the difference between the specific resistance for a thin and thick wire made of the same material?

The potential difference between the terminals of an electric heater is $60\, V$ when it draws a current of $4\, A$ from the source. What current will the heater draw,if the potential difference is increased to $120\, V$ (in $, A$)?

Power of a lamp is $60\, W$. Find the energy in joules consumed by it in $1\, s$. (in $, J$)

Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of $1.5\, V$,$5\, \Omega$,$10\, \Omega$ and $15\, \Omega$ resistors and a plug key,all connected in series.