Advertisements
Advertisements
प्रश्न
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
Advertisements
उत्तर
Given: P = 100 W, V = 250 volt
The current through the filament, I = `"P"/"V" = 100/250 = 0.4` A.
संबंधित प्रश्न
Which particles are responsible for current in conductors?
Name the commercial unit of electric energy.
Explain why, filament type electric bulbs are not power efficient.
Why is an electric light bulb not filled with air? Explain why argon or nitrogen is filled in an electric bulb.
An electrical appliance having a resistance of 200Ω is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes (i) in joules (ii) in kWh.
The coil of an electric bulb takes 40 watts to start glowing. If more than 40 W are supplied, 60% of the extra power is converted into light and the remaining into heat. The bulb consumes 100 W at 220 V. Find the percentage drop in the light intensity at a point if the supply voltage changes from 220 V to 200 V.
A simple electric circuit has a 30 V battery and a resistor ot 60 o. What will be the current in the circuit? The resistance of the oonnecting wires is negligible.
Of the three connecting wires in a household circuit: Which two of the three wires are at the same potential? In which of the three wires should the switch be connected?
Give two precautious that you would take while putting off an electric switch.
