## Physics MCQ on Physical World And Measurement for NEET, JEE, Medical and Engineering Exam 2021

MCQ on Physical World And Measurement: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations. In this post we are providing you MCQ on Physical World And Measurement, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

## MCQ on Physical World And Measurement

Q1. Identify the physical parameters that are having the same dimensions from the below-given list:

(i) Magnetic field

(ii) Energy density

(iii) Refractive index

(iv) Young’s modulus

(v) Dielectric constant

a) (ii) and (iv)
b) (i) and (v)
c) (iii) and (iv)
d) (iv) and (iii)

(a) (ii) and (iv)

Q2. Calculate the value of the dot product of the two vectors whose magnitudes are 3 units and 4 units and their resultant is 1 unit.
a) +6 units
b) -12 units
c) 0
d) -1 unit

(b) -12 units

Q3. How many numbers of base SI units are there?
a) 5
b) 10
c) 7
d) 9

(c) 7

Q4. Which the following is a dimensionless quantity?
a) Refractive index
b) Gravitational constant
c) Velocity
d) Planck’s constant

(a) Refractive index

Q5. Following are the readings obtained while measuring the diameter of a wire by using the screw gauge0 mm is the main scale reading 52 divisions are the circular scale reading. What is the diameter of the wire if 1 mm on the main scale is equal to the 100 divisions on the circular scale?
a) 0.016 cm
b) 0.052 cm
c) 0.15 cm
d) 0.05 cm

(b) 0.052 cm

Q6. What is the percentage error in the measurement of the kinetic energy of a body, if there is a positive error of 50% in the speed of the body?
a) 125%
b) 50%
c) 30%
d) 100%

(d) 100%  