In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb (undesirable form).
What energy transformation occurs when a light bulb is switched on?
When a battery lights a bulb, first the battery converts chemical energy into electrical energy. This electrical energy is converted into heat and light.
What is the energy transformation of a electric bulb?
In the light bulb, the flow of charge through the filament heats it up and causes it to glow. In this way, the light bulb converts electrical energy to heat energy and light energy.
What energy transformation occurs in an electric bulb class 9?
When the bulb receives this electrical energy, then it converts it into light and heat energy. At first, the energy transformation takes place in the battery and then the bulb. Hence, the transformation of energy in the given situation can be shown as: Chemical Energy → Electrical Energy → Light Energy + Heat Energy.
What happened to the bulb when the switch was turned on?
When the switch is open, the light cannot operate since the circuit is not complete. There is no closed-loop path for the current to flow through the circuit. When the switch is closed, the light bulb operates since the current flows through the circuit.
Which forms of energy are transformed in an electric bulb Class 7?
Electric energy is transformed to light and heat in the case of an electric bulb.
What indicates that the bulb light up?
When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.
Why does the bulb light up when the switch is closed?
Closing the switch makes the lamp light up because the cell can push an electric current around the circuit. … When the switch is closed, the lamp lights up. This is because there is a continuous path of metal for the electric current to flow around. If there were any breaks in the circuit, the current could not flow.
What will happen to the bulb after turning off the switch and why?
Popular Answers (1)
Thus, even though the switch is “off”, there is a very small current flowing through it, which charges up the filter capacitor after the input rectifier of the CFL ballast electronic circuit. There is a diac trigger circuit to ignite the lamp after the capacitor voltage reaches a certain voltage.