1000+ Illumination MCQ Questions and Answers Pdf - 2

Question: 6

When a fluorescent lamp is to be operated on D.C. which of the following additional devices must be incorporated in the circuit?

(A) condenser

(B) resistance

(C) transformer

(D) inductance

Question: 7

Luminous flux is

(A) the rate of energy radiation in the form of light waves

(B) the part of light energy, radiated by sun, which is received on the earth

(C) the light energy radiated by sun

(D) none of the above

Question: 8

In electric discharge lamps for stabilizing the arc

(A) a variable resistor is connected in the circuit

(B) a condenser is connected in parallel to the supply

(C) a condenser is connected in series to the supply

(D) a reactive choke is connected in series with the supply

Question: 9

Carbon arc lamps are commonly used in

(A) street lighting

(B) domestic lighting

(C) cinema projectors

(D) photography

Question: 10

Which of the following statements is correct?

(A) light consists of electromagnetic waves

(B) light consists of shooting particles

(C) light is a form of electrical energy

(D) light is a form of heat energy