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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 Fo a body B Force = mass x acceleration Ma = mg -... 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)... View Article

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, = 2 x 0.06 x 4 = 0.48 kgm/s Hence, the correct... 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) ... View Article

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 organisms where... 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 as plan because of the similarity... 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 y. According to the question, we can write the... 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. Therefore, the correct... 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) after increasing the speed by 2 m/s Hence, final... 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 = I.π.r2 Substituting r = L/2π we get, M = I. π.... 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. So, the... 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, the correct option is... 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 option is (d)... View Article

What is the percentage of nitrogen in air? (a) 21% (b) 0.1% (c) 54% (d) 78%

The percentage of nitrogen in air is 78%. Hence, the correct option is (d) Learn more: Air, Composition, Properties... View Article

Give reasons SO2 is reducing while TeO2 is an oxidising agent

In sulphur, due to the presence of empty d-orbital, it can expand its oxidation state from the +4 to the +6 oxidation state. Hence, it acts as a... View Article

Which of the following are necessary for photosynthesis (a) Light and suitable temperature (b) Chlorophyll and water (c) Carbon dioxide (d) All of the above

Photosynthesis is the process in which green plants use sunlight to make their own food. Photosynthesis requires sunlight, chlorophyll, water,... View Article

Timur invaded northern India during the reign of __________ (a) Abu Bakr Tughlaq (b) Ghiyasuddin Tughlaq (c) Muhammad-bin-Tughlaq (d) Nasiruddin Mahmud Tughlaq

Timur invaded northern India during the reign of Nasiruddin Mahmud Tughlaq. Therefore, the correct option is (d) Learn more: Tughlaq Dynasty... View Article

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