27 Jan 2022: PIB Summary for UPSC
TABLE OF CONTENTS 1. India-Central Asia Virtual Summit 2. Air India strategic disinvestment 3. ODF plus village 4. Conditional Market... View Article
Latest Posts
Xenotransplantation [UPSC Science & Technology]
In January 2022, in a medical first, doctors transplanted a pig heart into a patient to save his life in... View Article
Difference between Artificial Intelligence and Machine Learning
Artificial Intelligence and Machine Learning are the famous terminologies belonging to the computer science family. In this article we will... View Article
Difference between Array and Linked List
What is Array? An array is a grouping of data elements or data items stored in contiguous memory. An array... View Article
Difference between Oracle and MySQL
Both oracle and mysql are important terms belonging to the database family. Let’s find out some major differences between oracle... View Article
Differences between Checked and Unchecked Exceptions in Java
An exception in Java is a spontaneous event that occurs during the runtime that can interrupt the regular flow of... View Article
Difference between Vacation and Holiday | Holiday vs Vacation
You might have heard about the terms ‘holiday’ and ‘vacation’, and some of you might have assumed that both these... View Article
Difference between Assure and Ensure | Assure vs Ensure
Though these two words might look similar, they are not. There are plenty of pairs of words present in the... View Article
Difference between Anybody and Anyone | Anybody vs Anyone
You might have heard people using the words ‘anybody’ and ‘anyone’ quite often and might have wondered whether these words... View Article
Difference between Under and Beneath | Under vs Beneath
The words ‘under’ and ‘beneath’ are often used interchangeably, but while doing so, most people don’t know whether they have... View Article
Difference between Test and Experiment
You might have often heard the words ‘test’ and ‘experiment’ and wondered if they have the same meanings or not.... View Article
Difference between Test and Exam | Test vs Exam
All of us have heard our teachers or parents using the terms ‘test’ and ‘exam’ very frequently. Have you ever... View Article
Difference between Alone and Lonely | Lonely vs Alone
Most people often joke about English being a funny language. The reason is that there are many words that people,... View Article
Difference between Lift and Elevator | Lift vs Elevator
Explore What the Difference between Lift and Elevator is There are some terms in the English Language that people often... View Article
A cylindrical tube open at both ends has a fundamental frequency f in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is now
a) f/2 b) f c) 3f/4 d) 2f Answer: b) f Solution: Case 1: λ/2 = l ⇒ λ = 2l... View Article
Two waves are represented by, y1 = A sin (kx – ωt) and y2 = A cos (kx – ωt)
The amplitude of the resultant wave is 1) 4A 2) 2A 3) √2 A 4) A Answer: 3) √2 A Solution:... View Article
Two points on a travelling wave having frequency 500 Hz and velocity 300 ms-1 are 600 out of phase, then the minimum distance between the two points is
a) 0.2 b) 0.1 c) 0.5 d) 0.4 Answer: b) 0.1 Solution: As, v=nλ Therefore, λ=v/n=300/500=3/5m phase difference =(2π/λ)× path difference... View Article
The equation of a progressive wave can be given by y =15sin (660πt – 0.02πx). The frequency of the wave is
a) 330 Hz b) 342 Hz c) 365 Hz d) 660 Hz Answer: a) 330 Hz Solution: y=15sin(660πt−0.02πx) The general equation... View Article
A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below 1250 Hz. The velocity of sound in air is 340 m/s
a) 12 b) 8 c) 6 d) 4 Answer: c) 6 In fundamental mode λ/4=0.85 λ=4×0.85 f = v/λ=340/(4×0.85)=100 Hz. The... View Article
Some of the frequencies of tones produced by an organ pipe are 220, 440, 550, 660 Hz. Find the effective length of the pipe. (take, the speed of sound in air = 330 m/s)
a) 1.8 m b) 1.7 m c) 1.5 m d) 1.2 m Answer: c) 1.5 m Solution: Frequencies of tones produced... View Article
