He was a member of Edison's research team, which was called "Edison's Pioneer". He developed and patented a method of manufacturing his carbon filaments.

Who was the American inventor experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting and eventually produced a bulb that could glow for over 1500 hours.

What was wrong with Joseph Wilson Swan carbon paper filament?

Who invented the treatment for the filament so that it would not darken the inside of the bulb as it glowed?

Who invented a tungsten filament, which lasted even longer than the older filaments.

Which light bulb filament lasted the longest?

The following are the functions of ballast EXCEPT;

What is the color of High-pressure sodium lamp?

The following are the parts of starter EXCEPT;

The following are the parts of ballast EXCEPT;

Which of the following is the advantages of LED?

Aling Nena, bought a fluorescent lamp last week, on the second week the fluorescent lamp fails to light, upon checking there is a leak in the lamp. What may be the possible corrective actions?

What will happen if there is a constant switching On and Off the circuit?

If there is an improper wiring in the fluorescent lamp, what may be the possible corrective actions?

The following are the possible cause for slow and intermittent starting of fluorescent EXCEPT;

Which of the following is the symbol of duplex switch?

What does this electric symbol represent ─── ── ─── ── ?

How many different theories did Edison and his team work on?

When was the first incandescent lamp invented?

What do you call the metal wires that flash brilliantly when electricity goes through them?

What type of gas is inside the glass envelope of an incandescent lamp that prevents the tungsten filament from melting?

The following are the elements used in manufacturing incandescent lamp, EXCEPT:

An electric discharge lamp in which the light is produced by the radiation from excited mixture of metallic vapor (mercury) and the products of the dissociation of halides (for example of thallium, indium, sodium).

It is an electric discharge lamp in which the major portion of the radiation is produced by the excitation of mercury atoms.

Which of the following is NOT parts of the fluorescent lamp?

What do you call to the point of connection of fluorescent and starter?

Which of these is a gas discharge lamp, which releases colored visible light stimulated by ions and electrons?

It is a tubular/linear containing Mercury vapor and inert gas with phosphor coating inside.

A glow switch that opens and closes the circuit.

What is the rated average life span of a fluorescent lamp?

Which of the lamps requires starter (glow switch) and is pre-heated during starting?

Which of the lamps requires high voltage in its operation. This lamp has electrodes made of thimble-type iron?

What do you call to the semiconductor device that emits visible light when an electric current passes through it?

Which part of the incandescent lamp carries electricity from the bulb’s electrical contact to the filament.

What is known as the bulb's metallic base, which connects to the filament's contact.

What is referred to as the bulb's threaded base, which holds it to a lamp?

Which of these lamps are used for interior and exterior general task lighting?

Which of these lamps are used in photography and projection services.

Which of these lamps are used in automotive, aircraft, and appliance application.