question_answer

Sita and her brother Ramesh were travelling on bike. Sita was sitting behind her brother. At a place traffic signal turned red from green and Ramesh continued riding. Sita noticed red Signal and stopped her brother Ramesh. Her brother felt happy on Sita's intelligence.

(i) What kind of value is expressed by Sita?

(ii) What are the principles that are used in maintaining traffic signals?

Answer:

(i) Sita?s Presence of mind, awareness of traffic rules with high visual sensibility.

(ii) Principle of photoelectric effect is used to maintain the traffic signal.