Which element is commonly used in light bulb filaments? MCQ with Answer and Explanation

Which element is commonly used in light bulb filaments?
A. Tungsten
B. Gold
C. Copper
D. Silver
Answer: Option A
Solution (By JKSSB Mock Tests)
Tungsten has a very high melting point, making it perfect for light bulb filaments.

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Question #1
Which planet is known as the 'Red Planet'?
A. Venus
B. Jupiter
C. Saturn
D. Mars

Correct Answer: Option D


Explanation:
Mars appears reddish due to iron oxide (rust) on its surface.

Question #2
What is the study of bacteria called?
A. Bacteriology
B. Phycology
C. Mycology
D. Virology

Correct Answer: Option A


Explanation:
Bacteriology is the branch of science that studies bacteria.

Question #3
What is the primary application of mRNA technology in recent advancements?
A. COVID-19 vaccines
B. Solar panels
C. Electric vehicles
D. Quantum chips

Correct Answer: Option A


Explanation:
mRNA technology was key in Pfizer and Moderna COVID-19 vaccines.