Practice Units and MeasurementRRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Physics question set covers important concepts related to Units and Measurement, helping you revise essential Physics concepts and understand the types of questions asked in RRB examinations.
Each question includes the correct answer and an explanation to help you understand the concept, strengthen your Physics fundamentals, and revise important Heat topics for RRB Railway examinations.
Start practicing Units and MeasurementRRB PYQs and strengthen your Physics preparation
81
SI unit of stress is
RRB SSE
2014
✓ Answer:CN/m^2
Stress is force per unit area, so its SI unit is N/m², also called pascal.
82
Newton is SI unit of
RRB Group D
2018
✓ Answer:BWeight and Force
Weight is a force; both weight and force have the SI unit newton.
83
What is the SI unit of wave speed?
RRB JE
2019
✓ Answer:BMeter/second
Wave speed = wavelength × frequency, giving units m × s^-1 = m/s.
84
SI unit of electric current is
RRB Group D; RRB Group D; RRB ALP & Technician
RRB Group D; RRB Group D; RRB ALP & Technician
2018; 2018; 2018
✓ Answer:AAmpere
Electric current is charge flowing per unit time, Q/t, and is measured in amperes.
85
Which of the following pairs does not have the same SI units?
RRB Group D; RRB Group D
2018; 2018
✓ Answer:CForce and Pressure
Force is measured in newtons while pressure is measured in pascals; the other listed pairs share units.
86
Atomic radius is measured in
RRB JE
2019
✓ Answer:DNanometer
Atomic dimensions are commonly expressed in nanometres; 1 nm = 10^-9 m.
87
Match the following: (1) Magnetic flux density (2) Self inductance (3) Magnetic flux
RRB SSE
2014
✓ Answer:D1-a, 2-c, 3-b
Magnetic flux density is tesla, self-inductance is henry, and magnetic flux is weber.
88
In the following which pair has not same unit?
RRB Group D
2018
✓ Answer:DForce and Pressure
Speed and velocity both use m/s; work and energy use joule; distance and displacement use metre. Force and pressure have different units.
89
In CGS system, the unit of strain is
RRB SSE
2014
✓ Answer:CNo unit
Strain is a ratio of change in length to original length, so it is dimensionless and has no unit.
90
Which of the following has no unit?
RRB ALP & Technician; RRB Group D
RRB ALP & Technician; RRB Group D
2018; 2018
✓ Answer:BRelative density
Relative density is a ratio of two densities, so the units cancel.
Showing 81 – 90 of 94 MCQ Questions | Page 9 of 10
![RRB JE Biology [PYQ FREE PDF] Question and Solved Problem with Solution](https://rrbjepyq.in/wp-content/uploads/2026/10/rrb-je-biology-feature-image-300x169.webp)
