NEET UG PHYSICS Multiple Choice Questions (MCQs)

1. Which of the following is a fundamental unit?

1. Newton
2. Joule
3. Kilogram
4. Pascal

Answer: c) Kilogram

2. What is the SI unit of electric current?

1. Coulomb
2. Ampere
3. Ohm
4. Volt

Answer: b) Ampere

3. If the least count of a vernier caliper is 0.01 cm, the reading 5.63 cm implies an error of up to:

1. ±0.01 cm
2. ±0.05 cm
3. ±0.1 cm
4. ±0.5 cm

Answer: a) ±0.01 cm

4. The dimensional formula of force is:

1. [MLT^-2]
2. [MLT^-1]
3. [M⁰L¹T^-2]
4. [ML²T^-2]

Answer: a) [MLT^-2]

5. A measurement is recorded as 3.45 m. The number of significant figures is:

1. 1
2. 2
3. 3
4. 4

Answer: c) 3

6. Dimensional analysis is used to:

1. Derive a relation between physical quantities
2. Convert one system of units to another
3. Check the correctness of a physical equation
4. All of the above

Answer: d) All of the above

7. What is the SI unit of pressure?

1. Dyne
2. Newton per square meter
3. Joule per square meter
4. Pascal

Answer: d) Pascal

8. The error in measurement of length L is 2% and in breadth B is 3%. The maximum error in area calculation is:

1. 5%
2. 6%
3. 8%
4. 2%

Answer: b) 5%

9. Which of the following does not have the same dimensional formula as energy?

1. Work
2. Power
3. Torque
4. Heat

Answer: b) Power

10. In dimensional analysis, the dimensions of Planck's constant are:

1. [ML²T^-1]
2. [ML¹T^-1]
3. [ML⁰T^-1]
4. [M⁰L²T^-2]

Answer: a) [ML²T^-1]

11. The physical quantity with dimensions [M¹L²T^-3] is:

1. Energy
2. Power
3. Force
4. Pressure

Answer: b) Power

12. Which of the following is the least accurate measurement tool?

1. Vernier caliper
2. Screw gauge
3. Meter scale
4. Micrometer

Answer: c) Meter scale

13. If the dimensions of a physical quantity are [ML^-1T^-2], it could represent:

1. Surface tension
2. Stress
3. Velocity gradient
4. Force per unit length

Answer: a) Surface tension

14. The main purpose of dimensional analysis is to:

1. Derive mathematical relationships
2. Solve numerical problems
3. Convert units
4. Verify the physical consistency of equations

Answer: d) Verify the physical consistency of equations

15. The dimensional formula of a universal gravitational constant G is:

1. [M^-1L³T^-2]
2. [ML^-3T²]
3. [M¹L¹T^-2]
4. [M¹L²T^-1]

Answer: a) [M^-1L³T^-2]