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A long solenoid of diameter 0.1m has 2×10⁴ turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4A in 0.05s. If the resistance of the coil is 10π²Ω the total charge flowing through the coil during this time is (1) 32 πμC (2) 32 μC (3) 16 πC (4) 16 πμC

Answer: (2) 32 μC Given that Number of turns (n) = 100 Radius (r) = 0.01m Resistance (R) = 10π2Ω We know that by Lenz's law Dividing... View Article

During the kinetic study of the reaction, 2A+B give C+D following results were obtained.

During the kinetic study of the reaction, 2A+B → C+D following results were obtained. Rune [A] in M[B] in M. Initial rate of formation of D... View Article

The quantity of electricity required to reduce 12.3 g of nitro benzene to aniline assuming 50% current efficiency is?

The quantity of electricity required to reduce 12.3 g of nitro benzene to aniline assuming 50% current efficiency is? 115800 C 28950 C 231600 C... View Article

Define excretion

Excretion is defined as the biological process in which the harmful metabolic wastes are removed from the body.... View Article

Cylindrical lens is used by a person suffering from?

Cylindrical lens is used by a person suffering from? presbyopia myopia astigmatism hypermetropia The correct option is iii. astigmatism... View Article

The resultant magnetic moment for the following arrangement is

The resultant magnetic moment for the following arrangement is? 4M 3M 2M M The correct option is iii. 2M... View Article

To hear a clear echo, what should be the minimum distance between the reflecting surface and the observer?

To hear a clear echo, what should be the minimum distance between the reflecting surface and the observer? 17 feet 17 meters 170 feet 170... View Article

Tibet is known as the roof of the world. Why?

Tibet is known as the roof of the world because its average height is more than 4000 m above the sea level. Also, the highest peak in the world,... View Article

A collateral vascular bundle is one in which xylem and phloem strands are present on the same radius, with phloem towards?

A collateral vascular bundle is one in which xylem and phloem strands are present on the same radius, with phloem towards? all around the... View Article

n-factor of KMnO4 in neutral medium is

n-Factor of KMnO4 in neutral medium is? 6 5 4 3 The correct option is iv. 3... View Article

Give examples for herbs , shrubs,climbers ,creapers

The following are the examples of: Herbs: sunflower, mustard, tomato, and carrot Shrubs: tulsi, rose, jasmine, and lemon Trees: mango, oak,... View Article

Lithium chloride is highly soluble in

Lithium chloride is highly soluble in? C6H6 H2O... View Article

The ratio of diameters of two wires of same material is n:1. The length of each wire is 4m. On applying the same load, the increase in the length of the thin wire will be?

The ratio of diameters of two wires of same material is n:1. The length of each wire is 4m. On applying the same load, the increase in the length... View Article

A calorie is a unit of heat or energy and it equals about 4.2 J where 1J=1kg²/s². Suppose we employ a system of units in which the units of mass equals α kg, the units of length equals β m, the unit of time is γ s. Show that a calorie has a magnitude 4.2 α^-1, β^-2 and γ² in terms of the new units.

From standard formula of unit conversion, we know that, Given unit/New unit = (M1/M2)2 (L1/L2)2... View Article

ABC is a right-angled triangle in which ∠A=90° and AB=AC. Find ∠B and ∠C.

AB=AC Therefore, ΔABC is a right-angled isosceles ∠B=∠C (angles opposite to equal sides are equal)... View Article

Ora serrata is

Ora serrata is? present in utriculus of ear oral cavity of protochoradates gland present in oral cavity of frog a serrated junction between... View Article

Infection of ascaris usually occurs by

Infection of Ascaris usually occurs by? mosquito bite tse-tse fly drinking water containing eggs of Ascaris eating imperfectly cooked pork... View Article

A 1.2m tall girl spots a balloon moving with the wind in a horizontal line at a height of 88.2m from the ground. The angle of elevation of the balloon from the eyes of the girl at any instant is 60°. After some time, the angle of elevation reduce to 30°. Find the distance travelled by the balloon during the interval.

Given: In ΔACE, AE/CE = tan 60° 88.2-1.2/CE = √3 CE = 29√3 In ΔBCD, BG/CG = tan 30° 88.2-1.2/CG... View Article

Replum is present in the ovary of flower of

Replum is present in the ovary of the flower of? sunflower mustard lemon pea The correct answer is ii. mustard... View Article

Why is it good to have rebels

It is good to have rebels because they teach us how to accept and respect the difference of opinions.... View Article