Skip to main content

Practice Questions on Units and measurement

Practice Tests
Which of the following is a derived unit?
(2) unit of Area


Q2. E, m, L, G denote energy, mass, angular
momentum and gravitation constant respectively.
The dimensions of EL²/m²G² will be that of

Comments

Post a Comment

Popular posts from this blog

Chemistry - periodic table PYQ 2022

Q.The first ionization enthalpy of Na, Mg and Si, respectively, are: 496, 737 and 786 kJ mol¹. The first ionization enthalpy (kJ mol¹) of Al is:                                                         ( JEE mains 2022) 1. 487  2.  768 3. 577 4. 856 Show Answer Ans:- [c] I. E: Na < Al < Mg < Si  .. 496 <IE (Al) < 737  Option (C), matches the condition .  i.e IE (Al) = 577 kJmol-¹
Post a Comment
Read more

Physics - JEE mains PYQ

 Q. Position of an ant (S in metres) moving in Y-Z plane is given by S=2t²j+5k (where t is in second). The magnitude and direction of velocity of the ant at t = 1 s will be :                                                         (Jee mains- 2024) 1. 16 m/s in y-direction  2. 4 m/s in x- direction  3. 9 m/s in z- direction  4. 4 m/s in y-direction  Show Answer 4 m/s in y-direction. v=ds/dt=4t ĵ At t = 1 sec v = 4ĵ More Questions kinametics PYQ
Post a Comment
Read more

Chemistry - metallurgy PYQ 2022

 Q. In metallurgy the term "gangue" is used for:                                                         ( JEE mains 2022 ) 1. Contamination of undesired earthy materials. 2. Contamination of metals, other than desired metal 3. Minerals which are naturally occuring in pure form 4.Magnetic impurities in an ore. Show Answer Ans:- [A] Earthy and undesired materials present in the ore, other then the desired metal, is known as gangue.
Post a Comment
Read more

Physics - simple harmonic motion pyq 2023

 Q. In a linear simple harmonic motion (SHM) (A) Restoring force is directly proportional to the displacement.  (B) The acceleration and displacement are opposite in direction.  (C) The velocity is maximum at mean position. (D) The acceleration is minimum at extreme points.  Choose the correct answer from the options given below:                                                         (JEE mains 2023) 1. (A), (B) and (C) only   2. (C) and (D) only 3. (A), (B) and (D) only 4. (A), (C) and (D) only Show Answer Ans. (1)   F=-kx,          A true  a=-w²x.      B true  Velocity is maximum at mean position, C true  Acceleration is maximum at extreme point, D false
Post a Comment
Read more

Physics - waves PYQ series 2023

 Q. The height of transmitting antenna is 180 m and the height of the receiving antenna is 245 m. The maximum distance between them for satisfactory communication in line of sight will be :                                                         ( JEE mains 2023) 1. 48 km 2. 56 km 3. 96 km 4. 104 km Ans. (4)   dmax = √(2Rh, +2Rh) = √2x64×105×180+2×64×105×245  = {(8× 6 × 10³) + (8 × 7 × 10³)} m  = (48 +56) km  = 104 km
Post a Comment
Read more

Physics - Radioactivity PYQ 2023

 Q. The half-life of a radioactive nucleus is 5 years, The fraction of the original sample that would decay in 15 years is :                                                         ( JEE mains 2023) 1. 1/8 2. 1/4 3. 7/8 4. 3/4 Show Answer Ans. (3)  15 year = 3 half lives  Number of active nuclei = N/8  Number of decay = 7/8N
Post a Comment
Read more

Chemistry - jee mains PYQ 2023

   Q. The volume (in mL) of 0.1 M AgNO3 required for complete precipitation of chloride ions present in 20 mL of 0.01 M solution of [Cr(H2O)5Cl]Cl2 as silver chloride is                                                     (jee2023) Show Answer And: 4
Post a Comment
Read more

Indefinite Integration: Complete Notes for JEE Mains & Advanced

Indefinite Integration: Comprehensive Notes for JEE Mains & Advanced Indefinite Integration is a cornerstone of Calculus, critical for JEE aspirants. It involves determining the original function when its derivative is known. This guide covers every concept, formula, and technique from basic to advanced levels, along with JEE-specific tips and tricks to solve problems faster. Table of Contents Definition Basic Formulas Advanced Forms (JEE Advanced Syllabus) Methods of Integration Special Integrals Tricks and Shortcuts Solved Examples Practice Problems Preparation Tips for JEE 1. Definition of Indefinite Integration Indefinite Integration refers to finding a function F(x) such that: \frac{d}{dx}F(x) = f(x) The integral is represented as: \int f(x) \, dx = F(x) + C where C is the constant of integration. Key I...
Post a Comment
Read more

Rocket Launch Trajectory Calculation Using Calculus

Rocket Launch Trajectory Calculation Using Calculus Understanding rocket trajectories is essential in predicting a rocket's flight path. By applying the principles of calculus, we can calculate the rocket's position over time based on its initial velocity and launch angle. This article explains how to derive the equations for rocket trajectory and provides an interactive tool to visualize the flight path. Understanding Rocket Trajectory The motion of a rocket can be analyzed using the equations of projectile motion, which are derived using calculus. The trajectory of a rocket depends on the initial velocity, launch angle, and gravitational force. The key equations governing the motion are: \[ x(t) = v_0 \cos(\theta) t \] \[ y(t) = v_0 \sin(\theta) t - \frac{1}{2} g t^2 \] where: - x(t) is the horizontal distance (m), - y(t) is the vertical height (m), - v_0 is the initial velocity (m/s), - \theta is the launch angle (degrees), - g is the grav...
Post a Comment
Read more

Chemistry PYQ - Question no. 6

 Q. Which structure of protein remains intact after coagulation of egg white on boiling?                                                         (JEE mains 2024) 1. Primary 2. Tertiary 3. Secondary 4.Quaternary Show Answer (1)  Boiling an egg causes denaturation of its protein resulting in loss of its quaternary, tertiary and secondary structures. Loading…
Post a Comment
Read more