Archives

What are different types of inertia and examples?

The following are the three types of inertia: 1. Inertia of Rest Example: Sudden start of lift 2. Inertia of Direction Example: One's body... View Article

If a 12 volt battery is connected to the arrangement of resistance given below. Calculate (i) the total effective resistance of the arrangement (ii) the total current flowing in the circuit.

Answer: (i) The 5 Ω resistors are connected in series Hence, their effective resistance = (5 +5) = 10 Ω Also, the 10 Ω resistors are connected... View Article

Why do we feel uneasy when Ferris wheel moves downward?

Firstly, Ferris wheel is also known as giant wheel. It revolves around its central axis, in a vertical plane.Now, when the wheel is moving in an... View Article

Draw the figure depicting low amplitude and high amplitude

The image below shows a low amplitude sound wave and a high amplitude sound wave.... View Article

Is angular momentum a scalar or vector? If it is a vector, what rule is used to determine its direction?

Angular momentum is a vector quantity and it can be expressed as . Its direction is determined by right-handed screw rule or right hand thumb rule.... View Article

Sky wave communication is based upon

(a) reflection by inosphere (b) absorption by ionosphere (c) transmission through ionosphere (d) none of theseCorrect option: (a) reflection by... View Article

Find the dimensions of the following elements.

(a) angular speed ω (b) angular acceleration α (c) torque τ and (d) moment of interia I. Dimensions of the given elements are:... View Article

A trolley is falling freely on inclined plane as shown in the figure. The angle of string of the pendulum with the ceiling of trolley is (α) equal to

Given, angle of the inclined plane = θ If T is the tension acting on the trolley, The component of tension along the inclined plane is T... View Article

State Heisenbergs uncertainty principle.

Heisenberg’s uncertainty principle states that it is impossible to measure or calculate exactly, both the position and the momentum of an... View Article

Define electric current. What is its SI unit?

Electric current is defined as the rate of flow of negative charges of the conductor. The unit of the electric current unit is coulomb/Sec ( C/s... View Article

5 Example of negative work done.

5 Examples of negative work done are as follows: (i) the work done by the buoyant force of water in drowning of a ship (ii) the work done... View Article

A cylindrical conductor of length L and uniform area of crosssection a has resistance R. Another conductor of length 2L and resistance R of the same material has an area of cross-section (a) A/2 (b) 3A/2 (c) 2A (d) 3A

Answer: (c) 2A We know that R = ρ(L/A) where ρ is the resistivity constant of the conductor L is the resistance of a wire of length A... View Article

What is (X-Y) whole cube formula?

The formula for (X - Y) whole cube, i.e. (X - Y)3 is given by: (X - Y)3 = X3 - Y3 - 3XY(X - Y) Or (X - Y)3 = X3 - Y3 - 3X2Y + 3XY2... View Article

What is the unit digit in 7¹⁰⁵?

71 = 7 72 = 49 73 = 343 74 = 2401 75 = 16807 (unit digit is repeated) Now, divide the power, i.e. 105 by 4. 105/4 gives the quotient 26 and... View Article

Solve the following systems of equations: 152x – 378y = -74; -378x + 152y = -604

Given,152x - 378y = -74....(i)-378x + 152y = -604....(ii)Adding (i) and (ii),152x - 378y - 378x + 152y = -74 - 604-226x - 226y = -678-226(x + y)... View Article

The answer of addition is called the , the answer of subtraction is called the , when minuend = subtrahend, difference = __.

The answer of addition is called the Sum, the answer of subtraction is called the Difference, when minuend = subtrahend, difference = Zero.... View Article

If two positive integers a and b are written as a = x³y² and b = xy³ where x, y are prime numbers, then find HCF of a and b.

Given, a = x3y2 = (x) × (x) × (x) × (y) × (y) b = xy3 = (x) × (y) × (y) × (y) Since a, b are positive... View Article

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30