Nishant suggested his grandfather living in an ancestral house in a small town to replace filament bulbs with LED bulbs.
b. What are the values associated with Nishant's suggestion?
b. Values associated with Nishant's suggestion are-
Anjali visited her ancestral house in a small town. One day, all the lights got switched off in the evening. Her grandfather immediately checked the fuse and changed the fuse wire. The lights were on again. Anjali suggested her grandfather to use MCB in place of electric fuse.
b. What values are associated with Anjali's suggestion?
a. Why miniature circuit breakers are being used in houses nowadays?
Paheli set up an experiment using liquid A in the beaker as shown in Fig. She observed that the bulb glows. Then she replaced liquid A with another liquid B. This time the bulb did not glow. Boojho suggested replacing the bulb with an LED. They observed that the LED glows. Explain.
What is the full form of LED ? Why are LED bulbs considered energy efficient? Now explain why LED bulbs are preferred over filament bulbs. [5 MARKS]