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Unit and Dimension - Practice Set

Exam Preparation Quiz

Q1: What is the SI unit of length?

  • (A) Meter
  • (B) Kilogram
  • (C) Second
  • (D) Ampere

✅ Correct Answer: Option A

Explanation: The meter is the base unit of length in the International System of Units (SI). It is defined based on the speed of light.

Topic: SI Units Length

Q2: Which quantity has units of kg*m/s?

  • (A) Momentum
  • (B) Force
  • (C) Energy
  • (D) Power

✅ Correct Answer: Option A

Explanation: Momentum is defined as mass times velocity. Mass has units of kg and velocity has units of m/s, so momentum is kg*m/s.

Topic: Momentum Units

Q3: What is the SI unit of mass?

  • (A) Kilogram
  • (B) Gram
  • (C) Pound
  • (D) Ounce

✅ Correct Answer: Option A

Explanation: The kilogram is the base unit of mass in the SI system. It is a fundamental unit of measurement.

Topic: SI Units Mass

Q4: Which of these is a derived unit?

  • (A) Joule
  • (B) Second
  • (C) Meter
  • (D) Kelvin

✅ Correct Answer: Option A

Explanation: A Joule, the unit of energy, is derived from base units (kg*m^2/s^2). Other options are base units.

Topic: Derived Units

Q5: What is the SI unit of time?

  • (A) Second
  • (B) Minute
  • (C) Hour
  • (D) Day

✅ Correct Answer: Option A

Explanation: The second is the SI base unit for time. It's defined based on the frequency of a cesium atom's radiation.

Topic: SI Units Time


Article Prepared By: Java Mitra

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