V.K. Sally Solutions for Chapter: Electricity, Exercise 30: EXERCISE - 3C

Table shows electrical resistivity of some substances.

Table shows electrical resistivity of some substances.

With respect to electric energy, define kilowatt.

With respect to electric energy, define kilowatt hour.

Amongst the units watt hour, watt, kilowatt and kilowatt hour, which are the units of electric energy?

An electric lamp of $200\mathrm{\Omega }$ and a toaster of $100\mathrm{\Omega }$ are connected in parallel to $220 \mathrm{V}$ electricity source. An electric iron is connected to the same source permits the same current as the total flowing through both appliances. What is the current passing through the electric iron?

An electric lamp of $200\mathrm{\Omega }$ and a toaster of $100\mathrm{\Omega }$ are connected in parallel to $220 \mathrm{V}$ electricity source. An electric iron is connected to the same source permits the same current as the total flowing through both appliances. Calculate the power of electric iron.

Three incandescent bulbs of $100 \mathrm{W}$ each are connected in series in an electric circuit. In another circuit, another set of three bulbs of the same wattage are connected in parallel to the same source.
Let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.