Which SI prefix represents 10⁻⁶? MCQ with Answer and Explanation

Which SI prefix represents 10⁻⁶?
A. micro
B. pico
C. milli
D. nano
Answer: Option A
Solution (By JKSSB Mock Tests)
Micro (μ) denotes 10⁻⁶ in SI system. Nano = 10⁻⁹, pico = 10⁻¹², milli = 10⁻³. Standard prefixes: kilo(10³), milli(10⁻³), micro(10⁻⁶), nano(10⁻⁹). Memory aid: 'Micro = millionth; μm = micrometer = 10⁻⁶ m'. Frequently tested for unit conversion proficiency in competitive exams.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1
Alpha particles are fundamentally equivalent to:
A. Helium nuclei
B. Hydrogen nuclei
C. Fast-moving electrons
D. High-energy photons

Correct Answer: Option A


Explanation:
An alpha particle consists of two protons and two neutrons tightly bound together. This is completely identical to the nucleus of a helium atom (He²⁺). Alpha particles are positively charged, relatively massive, have low penetrating power, and are emitted by heavy radioactive elements during alpha decay.

This question belongs to: Science Physics
Question #2
The speed of sound in air at 0°C is 331 m/s. At 22°C, approximately
A. 331 m/s
B. 360 m/s
C. 343 m/s
D. 350 m/s

Correct Answer: Option C


Explanation:
v ≈ 331 + 0.6×T(°C) = 331 + 0.6×22 = 331+13.2 = 344.2 m/s, nearest 343 m/s.

This question belongs to: Science Physics
Question #3
One micron is equal to
A. 10⁻⁹ m
B. 10⁻¹⁰ m
C. 10⁻⁶ m
D. 10⁻³ m

Correct Answer: Option C


Explanation:
Micron or micrometer = 10⁻⁶ m.

This question belongs to: Science Physics