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Which of the following performs modulation and demodulation? (a) Coaxial cable (b) Satellite (c) Modem (d) Optical fibre (e) None of these

A modem performs both modulation and demodulation. A modem is a hardware which connects to a computer, broadband network or... View Article

The density of a cube is measured by measuring its mass and the length of sides. If the maximum error in the measurements of mass and length are 4% and 3% respectively, the maximum error in the measurement of density will be (a) 7% (b) 9% (c) 12% (d) 13%

mass of the cube = m length of the side of the cube = a volume of the cube v... View Article

An express train is moving with a velocity v1. Its driver finds another train is moving on the same track in the same direction with velocity v2. To escape collision driver applies a retardation a on the train. The minimum time of escaping collision be (a) t = (v1 – v2)/a (b) t = (v1^2 – v2^2)2 (c) None (d) Both

Given Both the trains are moving in the same direction. We will first calculate the relative velocity between them Initial... View Article

A charge q1 exerts some force on a second charge q2. If a third charge q3 is bought near, the force of q1 exerted on q2: (a) decreases (b) increases (c) remains unchanged (d) increases if q3 is of same sign as q1 and decreases if q3 is of opposite sign

remains unchanged As per the principle of superposition, The force between any two charged particles is independent of all other... View Article

The rough endoplasmic reticulum has _________ attached to it (a) Ribososmes (b) DNA (c) Lipids (d) Proteins

The rough endoplasmic reticulum has ribosomes attached to it. Rough endoplasmic reticulum has ribosomes embedded within its structure, giving a... View Article

Two acute angles cannot form a pair of supplementary angles. Justify

By definition, acute angles are the angles that measure the angle greater than 0° and less than 90°. If you... View Article

A drop of liquid of diameter 2.8 mm breaks up into 125 identical drops. The change in energy is nearly (S.T. of liquid = 75 dynes/cm) (a) zero (b) 19 erg (c) 46 erg (d) 74 erg

Given Diameter = 2.8 mm S.T. of liquid = 75 dynes/cm We know that, E = 4πR2T (n1/3-1) On substituting... View Article

A block A of mass 7 kg is placed on a frictionless table A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 ms^-2) (a) 100 ms^-2 (b) 3 ms^-2 (c) 10 ms^-2 (d) 30 ms^-2

For a body A Tension = Mass x Acceleration Let us consider Acceleration = a Tension = ma = 7a... View Article

Which of the following is not included in triratna of Jainism? (a) Right Knowledge (b) Right Conduct (c) Right Faith (d) Creator

Creator The teachings of Jainism includes right faith, right knowledge and right conduct Hence, the correct option is (d)

If two balls each of mass 0.06 kg moving in opposite directions with speed of 4 m/s collide and rebound with the same speed, then the impulse imparted to each ball due to other is (a) 0.48 kgm/s (b) 0.24 kgm/s (c) 0.81 kgm/s (d) Zero

Given Mass = 0.06 kg v = 4 m/s Impulse = Change in momentum = 2mv On substituting, we get,... View Article

Rihand project is there in (a) M.P. (b) U.P. (c) Maharashtra (d) None of these

Rihand project is there in U.P. Hence, the correct option is (b)

Gametes are usually __________ (a) Haploid (b) Diploid (c) Polyploid (d) Nulliploid

Gametes are usually haploid Gametes are haploid in nature and usually a direct product of meiotic division except in haploid... View Article

Why are rules considered to be plans?

Rules are set of standards or statements that help us understand what needs to be done. Rules can be considered... View Article

The sum of two numbers is 1000 and the difference between their square is 256000. Find the numbers.

Let’s assume the two numbers be x and y. And also assume that x is greater than or equal to... View Article

Which of the following is not unit of length? (a) Micron (b) Light year (c) Angstrom (d) Radian

Radian Radian is the standard unit of angular measure whereas angstrom, micron and light year are all units of length.... View Article

If the speed of a vehicle increases by 2 m/s, its kinetic energy is doubled. Then, the original speed of the vehicle is: (a) (√2 + 1) m/s (b) √2 m/s (c) 2 (√2 + 1) m/s (d) √2 (√2 + 1) m/s

Let K = (1/2) mv2 be the initial kinetic energy … (1) The final velocity will be (v + 2)... View Article

A wire of length L metre carrying a current of i ampere is bent in the form of a circle. Its magnetic moment will be (a) iL/4π (b) iL^2/4π (c) i^2L^2/4π (d) i^2L/4π

L = 2πr On calculating, we get, r = L/2π Magnetic moment is given by M = IA M =... View Article

Khetri is famous for _________ (a) Copper (b) Gold fields (c) Aluminium (d) Fertilisers

Khetri mines in Rajasthan and Singhbhum district of Jharkhand are leading producers of copper. Hence, Khetri is famous for copper.... View Article

The full form for BIFR in the context of the Indian Industry is ___________ (a) Board of Investment and Financial Redevelopment (b) Bureau for Industrial and Financial Revolution (c) Board for Investment and Formal Reconstruction (d) Board for Industrial and Financial Reconstruction

The full form for BIFR, in the context of the Indian Industry is Board for Industrial and Financial Reconstruction. Hence,... View Article

Artificial satellites use which of the following as a source of energy? (a) Leclanche cell (b) Dynamo (c) Electric generator (d) Solar cell

Artificial satellites and space probes like Mars orbiters use solar cells as the main source of energy. Hence, the correct... View Article

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