engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) General Science Physics Current Electricity
With reference to street-lighting, how do Mercury vapour lamps differ from LED lamps?
1. Mercury vapour lamps use a fraction of the energy used in the case of LED lamps.
2. LEDs have a lower radiance than mercury arc lamps.
3. Mercury lamps are eco-friendly as they require low voltages than LED lamps to operate.
Select the correct answer using the code given below.
1
2 only
2
3 only
3
1 and 3 only
4
1, 2 and 3