JEE Main Physics: Units & Measurements Practice Questions

14 questions with answers and step-by-step solutions. Tap any question to see the full worked solution.

Q1.
Which of the following is a fundamental unit in the SI system?
Easy
Q2.
What is the dimensional formula for force?
Easy
Q3.
Which of the following physical quantities has the same dimensions as impulse?
Easy
Q4.
The number of significant figures in 0.005060 is:
Easy
Q5.
Which of the following is a dimensionless quantity?
Easy
Q6.
If the unit of length is doubled and the unit of time is halved, then the unit of acceleration will be changed by a factor of
Medium
Q7.
The physical quantity which has the same dimensions as Planck constant is
Medium
Q8.
$A p h y s i c a l q u an t i t y P i sr e l a t e d t o f o u r o b ser v ab l es a, b, c, an dd a s P = a^{3} b^{2} / (s q r t (c) d) . T h e p er ce n t a g eer r or so f m e a s u r e m e n t ina, b, c, an dd a r e 1 p e$
Medium
Q9.
If the velocity of light c, gravitational constant G, and Planck constant h are chosen as fundamental units, the dimension of mass in this system is
Medium
Q10.
$T h e d e n s i t y o f ama t er ia l in C GS sy s t e m o f u ni t s i s 4 g / c m^{3} . I na sy s t e m o f u ni t s in w hi c h u ni t o f l e n g t hi s 10 c man d u ni t o f ma ss i s 100 g, t h e v a l u eo f d e n s$
Medium
Q11.
If the units of length, mass, and time are doubled, the unit of energy becomes how many times the original unit?
Hard
Q12.
If the velocity of light c, gravitational constant G, and Planck constant h are chosen as fundamental units, the dimension of mass in this system is proportiona
Hard
Q13.
A student measures the thickness of a wire using a screw gauge with a pitch of 1 mm and 100 divisions on the circular scale. If the zero error is +0.03 mm and t
Hard
Q14.
$T h ee q u a t i o n o f s t a t e f or a r e a l g a s i s g i v e nb y (P + a / V^{2}) (V - b) = R T . W ha t a r e t h e d im e n s i o n so f t h eco n s t an t a ?$
Hard

Track your progress on Units & Measurements

Start Practising Free →