Electricity generated at power stations is brought to our homes by two thick copper or aluminium wires. It is supplied through overhead cables or underground cables.There are three types of wire in the domestic circuit. The live wire, the neutral wire and the earth wire.
1. The live wire is at 220 volts with a frequency of 50 Hz.
2. The ground wire is maintained at zero potential by connecting it to a large plate buried in the ground.
3. The neutral wire is also maintained at almost zero potential.
Current enters an appliance through the live wire and returns through the neutral wire. An appliance that consumes relatively low power, e.g., a tube light or a fan, has just two terminals. Using them, the appliance is connected across the live and neutral wires. In two-terminal devices, it does not matter which terminal is connected to the live wire and which, to the neutral.
Current enters an appliance through the live wire and returns through the ________________________. | |||
Right Option : B | |||
View Explanation |
The _______________________ is maintained at zero potential by connecting it to a large plate buried in the ground. | |||
Right Option : C | |||
View Explanation |
A switch is a always connected to the _______________________ | |||
Right Option : C | |||
View Explanation |
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