Home › Tamil Nadu SSLC (Class 10) › Physics › Electricity › What is the role of the earth (ground) wire in a…
What is the role of the earth (ground) wire in a domestic electric circuit?
AIt carries the working current always
BIt raises the supply line voltage
CIt diverts leakage current to the ground
DIt stores up charge for later use
Answer & Solution
Correct answer: C. It diverts leakage current to the ground
1. The earth wire connects the metal body of an appliance to the ground.
2. If the live wire touches the metal body, the leakage current flows safely to earth.
3. This prevents the user from getting a dangerous shock.
4. It does not normally carry the working current or change the voltage.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 4 Electricity "Electricity", p.63_
Related questions
Electric fuse is a SAFETY device that:Domestic appliances in India are connected in:The dimension of the volt is:A potential difference of 12 V drives a current of 3 A through a resistor. The resistance Among Cu, Al, Fe and Hg, the BEST conductor of electricity at room temperature is:Resistivity of a metal as temperature increases:An ideal ammeter has:1 kilowatt-hour (kWh), the commercial unit of electrical energy, equals: