Draw a schematic diagram of a circuit consisting of a cell of $1.5 \, V$, a $10 \, \Omega$ resistor, a $15 \, \Omega$ resistor, and a plug key, all connected in series.

What type of electric charge does an electron possess?

What is the equivalent resistance of resistors $R_{1}$ and $R_{2}$ connected in parallel connection?

Which of the following formulas represents voltage $(V)$?

$(a)$ Why is the series arrangement not used for domestic circuits?
$(b)$ Why is tungsten used almost exclusively for the filament of electric lamps?
$(c)$ Why are the conductors of electric heating devices,such as bread toasters and electric irons,made of an alloy rather than a pure metal?
$(d)$ Why are copper and aluminium wires usually employed for electricity transmission?
$(e)$ Why does the cord of an electric heater not glow while the heating element does?

Which has a greater resistance$-$a $100$ $W$ bulb or a $60$ $W$ bulb?