1. Which of the following is a fundamental force in nature?
A) Frictional force
B) Gravitational force
C) Centripetal force
D) Electromagnetic force
Answer: B) Gravitational force
2. What is the primary focus of physics?
A) Study of living organisms
B) Study of matter, energy, and their interactions
C) Study of human behavior
D) Study of economic systems
Answer: B) Study of matter, energy, and their interactions
3. The unification of laws in physics refers to:
A) Combining multiple physical phenomena under a single theory
B) Creating laws for a specific phenomenon
C) Establishing a new branch of physics
D) Differentiating between classical and modern physics
Answer: A) Combining multiple physical phenomena under a single theory
4. Which of the following pairs represents fundamental physical quantities?
A) Velocity and force
B) Length and time
C) Temperature and pressure
D) Mass and density
Answer: B) Length and time
5. The SI unit of length is:
A) Centimeter
B) Meter
C) Kilometer
D) Foot
Answer: B) Meter
6. Which of the following errors occurs due to the faulty calibration of measuring instruments?
A) Systematic error
B) Random error
C) Least count error
D) Absolute error
Answer: A) Systematic error
7. The least count of a vernier caliper is determined by:
A) The smallest division on the main scale
B) The difference between one main scale division and one vernier scale division
C) The total length of the vernier scale
D) The number of divisions on the vernier scale
Answer: B) The difference between one main scale division and one vernier scale division
8. Dimensional analysis is useful for:
A) Measuring time accurately
B) Checking the consistency of equations
C) Determining the exact value of physical quantities
D) Measuring very small distances
Answer: B) Checking the consistency of equations
9. The dimensional formula of force is:
A) [M L T²]
B) [M L T¹]
C) [M L² T³]
D) [M L² T²]
Answer: A) [M L T²]
10. A systematic error in a measurement can be minimized by:
A) Repeating the experiment multiple times
B) Calibrating the instrument properly
C) Using a more precise instrument
D) Taking the average of multiple readings
Answer: B) Calibrating the instrument properly
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