When does interference of light takes place?
The interference of light takes place when a) energy is created in region of maximum intensity b) energy destroyed in... View Article
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The daily motion of the earth is
The daily motion of the Earth around its own axis is known as rotation.
Give the significance of a lattice point.
The significance of a lattice point is that each lattice point represents one constituent particle of a solid which may... View Article
What is the ratio of 1 mm to 1 cm?
The ratio of 1 mm to 1 cm is 1:10.
A heater boils certain amount of water in 15 minutes. Another heater boils same amount of water in 10 minutes. Time taken to boil same amount of water when both are used in series is
Answer: 6 minutes
Write the conditions for no refraction?
When the refractive indices are the same in both media then there will be no refraction and light will pass... View Article
The cut-in voltage for silicon diode is approximately
The cut-in voltage for silicon diode is approximately 0.7V
What is the value of √2?
The value of root 2 is equal to 1.41421…, i.e. √2 = 1.414.
Write all factors of the number 60.
All the factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 and 60. These... View Article
The following pair of linear equations is consistent or inconsistent?
2x – 3y = 8 4x – 6y = 9 These can be written as: 2x – 3y – 8... View Article
Sara has 400 marbles. if she gives (1/5)th of her marbles to Sam and Sam gives (3/4)th of his marbles to David, then how many marbles does Sam have left?
Given that Sara has 400 marbles.Number of marbles given to Sam = (1/5) × 400 = 80Number of marbles given... View Article
Solve for x: x/4 + x/6 = x – 7
Given,x/4 + x/6 = x – 7(3x + 2x)/12 = x – 75x = 12(x – 7)5x = 12x –... View Article
The cumulative frequency table is useful in determining
(A) mean (B) median (C) mode (D) all of theseCorrect answer: (B) medianThe cumulative frequency table is useful in determining... View Article
Difference Between: (1.00)³⁶⁵ = 1.00 and (1.01)³⁶⁵ = 37.7
The difference between the is presented as a power of compounding. The statement is a comparison about what has been... View Article
There are two pipes, an inlet pipe which completely fills a tank at 6 litre/min and an outlet pipe which empties the tank at 4 litre/min. The pipes function alternately for 1 minute and the inlet pipe is the first to function. Considering the capacity of the tank as 50 litres, how much time will it take to completely fill the tank?
Given, the capacity of the tank is 50 litres. Now, in the 1st minute the inlet pipe opened. So, 6... View Article
Write any two differences between a collection and a set.
A well-defined collection is called a set. Whereas, a collection of objects may or may not be well defined. In... View Article
Solve: 7m + 19/2 = 13
Answer: Given, 7m + 19/2 = 13 7m = 13 – (19/2) 7m = (26 – 19)/2 7m = 7/2... View Article
What is favourable outcomes and probability?
A possible result of a random experiment is called its outcome. A favourable outcome is an outcome that denotes how... View Article
Write the prime factors of 84.
The prime factorisation of 84 is 2 × 2 × 3 × 7 or 22 × 3 × 7, where... View Article
What are non zero rational numbers?
A non-zero rational number includes integers, fractions, square roots and π that are not 0 and are not square roots... View Article
