An electric bulb is marked 100 W, 250 V. What information does this convey?

What is a symbol ? What information does it convey ?

An electric bulb is rated "220 V, 100 W'. What is its resistance ?

An electric bulb is marked 100W, 230V. If the supply voltage drops to 115V, what is the heat and light energy produced by the bulb in 20min? Calculate the current flowing through it.

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to mains of voltage 250 V. Calculate : the current drawn,

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to mains of voltage 250 V. Calculate : the electrical energy consumed in 60 hours,

An electrical appliance is rated 1500 W, 250 V. This appliance is connected to mains of voltage 250 V for 60 hour. Calculate : the cost of electrical energy consumed at a rate of 4.50 per kWh.

An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply ?

An electric bulb is rated 250 W, 230 V'. Calculate: the time in which the bulb will consume 1.0 kWh energy when connected to 230 V mains.

A room heater is rated 500 W, 220V . (a) Find the resistance of its coil. (b) If the supply voltage drops to 200 V , what will be the power consumed? ( c) If an electric bulb rated 100 W, 220 V is connected in series with this heater, what will be the power consumed by the heater and by the bulb when the supply is at 220 V ?