MCQs on Electric Bulb with Answers PDF
MCQs on Electric Bulb: The invention of the light bulb has brought convenience to human beings, and it has been used to this day. The electric light bulb (or electric ball, tungsten filament lamp), an accurate technical name is an incandescent lamp.
The perimeter of the bulb is made of glass, and the filament is held in a vacuum or low-pressure inert gas to prevent the filament from oxidizing at high temperatures.
Electric light is a kind of artificial light source, which is a device that converts electrical energy into light energy for indication or lighting.
Here below we have provided MCQs on Electric Bulb with Answers PDF.
MCQs on Electric Bulb with Answers Pdf:
1. Which lamps have the shortest life in working hours?
A. Sodium vapor lamp
B. Fluorescent lamp
C. mercury vapor lamp
D. light bulb
Answer: D) light bulb
Explanation: Traditional incandescent light bulbs (light bulbs) generally have the shortest lifespan compared to other types like sodium vapor lamps, fluorescent lamps, and mercury vapor lamps.
2. The filament of an electric bulb is made of __
A. Copper
B. Aluminium
C. Tungsten
D. Nichrome
Answer: C) Tungsten
Explanation: Tungsten is used for the filament in electric bulbs because it has a very high melting point and can withstand the high temperatures needed to produce light without melting.
3. What is a dry cell?
A. which has two terminals
B. one terminal
C. three terminals
D. none of these
Answer: A) which has two terminals
Explanation: A dry cell is an electrochemical cell where the electrolyte is in a paste form, and it has two terminals: a positive and a negative.
4. Which lamps are used to illuminate sports stadiums.
A. Sodium vapor lamps
B. Light Bulbs
C. Fluorescent lamps
D. LED Bulbs
Answer: A) Sodium vapor lamps
Explanation: Sodium vapor lamps are commonly used for stadium lighting because they provide very bright and efficient light, suitable for large open areas.
5. Which material is present inside the bulb that glows on heating?
A. Filament
B. switch
C. cell
D. thick wire
Answer: A) Filament
Explanation: The filament inside an electric bulb is the component that glows when it is heated by the passage of electric current.
6. Why tungsten is used as a filament in electric bulbs?
A. soft metal
B. high melting point
C. low melting point
D. nonluminous
Answer: B) high melting point
Explanation: Tungsten is used because it has a high melting point of around 3422°C, which allows it to glow brightly without melting.
7. The second thick wire of the filament of the electric bulb is connected to a metal tip along the which side of the metal cover at the base of the bulb.
A. Short
B. conducting
C. long
D. None of the above
Answer: A) Short
Explanation: The short side of the metal cover at the base of the bulb provides a connection to the electrical circuit, ensuring the bulb can function properly.
8. ___________ of the following lamps uses a bimetallic strip?
A. Sodium vapor lamp
B. Fluorescent lamp
C. Light Bulb
D. Mercury vapor lamp
Answer: B) Fluorescent lamp
Explanation: Fluorescent lamps use a bimetallic strip in their starters to help initiate the lighting process by causing a brief short circuit to preheat the cathodes.
9. Two electric bulbs have transparent filaments of the same thickness. It one of them gives 60 W and other gives 100 W, then____________
A. 60 W lamp filament has a shorter length.
B.100 W lamp filament has a longer length.
C. 60 W lamp filament has a longer length.
D. 60 W and 100 W lamp filaments have equal length
Answer: C) 60 W lamp filament has a longer length
Explanation: For filaments of the same thickness, a lower wattage bulb (60 W) typically has a longer filament because it needs to dissipate less power, and thus the resistance is higher.
10.________ of the following lamps is used as a sign or an indicator light?
A. Light Bulb
B. Halogen lamp
C. Fluorescent lamp
D. Neon lamp
Answer: D) Neon lamp
Explanation: Neon lamps are often used for signs and indicator lights due to their bright and colorful glow, which makes them highly visible and effective for such purposes.