Advertisements
Advertisements
Question
In a simple circuit, why does the bulb glow when you close the switch?
Options
The switch produces electricity.
Closing the switch completes the circuit.
Closing the switch breaks the circuit.
The bulb is getting charged.
Advertisements
Solution
Closing the switch completes the circuit.
Explanation:
When you close the switch in a simple circuit:
- It completes the path for the electric current to flow.
- The electric current flows from the power source (like a battery), through the wires, the switch, and the bulb.
- The filament in the bulb heats up due to the flow of current, and as a result, the bulb glows.
APPEARS IN
RELATED QUESTIONS
Draw circuit symbols for variable resistance
Draw a circuit diagram to show how 3 bulbs can be lit from a battery so that 2 bulbs are controlled by the same switch the third bulb has its own switch.
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric motor
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
Name the instrument used to control current in an electric circuit.
Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.
Tabulate the different components of an electric circuit and their respective symbols.
Assertion: In an open circuit, the current passes from one terminal of the electric cell to another.
Reason: Generally, the metal disc of a cell acts as a positive terminal.
In an electric circuit a fuse is a ______ ______ to prevent possible fire.
Set up the circuit shown in Figure again. Move the key to ‘ON’ position and watch carefully in which direction the compass needle gets deflected. Switch ‘OFF’ the current. Now keeping rest of the circuit intact, reverse the connections at the terminal of the cell. Again switch ‘on’ the current. Note the direction in which the needle gets deflected. Think of an explanation.
