SSC JE EE: Utilization and Electrical Energy Booster Quiz-4

The colour of light produced by discharge lamp is orange-red due to discharge of _____?

Projection welding can be considered as a mass production form of:

Which is not a property of material used for filament of the incandescent lamp?

Quantity of light energy emitted per second from a luminous body is called?

Consider the following statements related to dc drives:

1. Wide speed control range

2. High starting torque

3. High power to weight ratio

4. Fast transient response

5. No limit on highest operating voltage

Out of these statements

Which of the following properties is NOT related to carbon electrodes in arc furnaces?

Recommended level of illumination for school and colleges is?

Average life of incandescent lamp is?

The method of speed control adopted in 25 kW, single-phase, 50 Hz traction is:

What is mean spherical candle power of a lamp when lamp has total flux of 1500 lumens?