Science
Answer
Two safety measures commonly used in electric circuits and appliances are:
- Earthing — Earthing protects the user from electric shocks as it provides a low resistance conducting path for the current. Any leakage of current in an appliance is transferred to the ground by earthing, hence the user may not get a severe electric shock.
- Fuse — It prevents damage to the appliance due to overloading. When the current in the circuit exceeds the maximum limit of the fuse element, the fuse melts to stop the flow of current protecting the appliance connected to the circuit.
Related Questions
In Activity 12.7, how do we think the displacement of rod AB will be affected if:
(i) current in rod AB is increased;
(ii) a stronger horse-shoe magnet is used; and
(iii) length of the rod AB is increased?
A positively-charged particle (alpha-particle) projected towards the west is deflected towards north by a magnetic field. The direction of magnetic field is
- towards south
- towards east
- downward
- upward
An electric oven of 2 kW power rating is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.
What precaution should be taken to avoid the overloading of domestic electric circuits?