What are solutions that conduct electricity called?

In a household electric circuit,different appliances are connected in parallel to one another. Give two reasons for this. An electrician puts a fuse of rating $5 \, A$ in that part of a domestic electrical circuit in which an electrical heater of rating $1.5 \, kW, 220 \, V$ is operating. What is likely to happen in this case and why? What change,if any,needs to be made?

What is meant by an electric circuit? Draw a circuit diagram to show an electric circuit comprising a battery of two cells,a resistor,an ammeter,and a plug key when the circuit is closed.

Heat dissipated by a conductor when a current is passed through it is directly proportional to the resistance of the conductor.

If a copper layer has to be deposited on a steel spoon by electroplating,where should the copper rod be connected?

$(a)$ Derive the formula for the calculation of work done when current flows through a resistor.
$(b)$ One electric bulb is rated $40 \ W$ and $240 \ V$ and another is $25 \ W$ and $240 \ V$. Which bulb has higher resistance and how many times?