Advertisements
Advertisements
प्रश्न
What changes in energy occur in an electric bulb?
Advertisements
उत्तर
In an electric bulb, electrical energy changes to heat and light energy.
संबंधित प्रश्न
What determines the rate at which energy is delivered by a current?
When a current of 4.0 A passes through a certain resistor for 10 minutes, 2.88 × 104 J of heat are produced. Calculate
the power of the resistor.
the voltage across the resistor.
State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
Why is a concave reflector placed behind the heating element in a room heater.
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
Out of the three fuses with current ratings 5A, 10A, 15A, which one is to be connected in a geyser circuit marked 3 kW, 220V? Give reason for your answer.
A cooler of 1500 W, 200 volts and a fan of 500 W, 200 volts are to be used from a household supply. The rating of fuse to be used is:
In the given figure, the emf of the cell is 2.2 V, and if internal resistance is 0.6 Ω. Calculate the power dissipated in the whole circuit.

Two heaters A and B have power rating of 1 kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is ______
