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A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is :

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A rectangular loop of sides 10 cm and 5 cm carrying a current 1 of 12 A is placed in different orientations as shown in the figures below : ltBrgt If there is a uniform magnetic field of 0.3 T in the positive z direction, in which orientations the loop would be in (i) stable equilibrium ?

A multiple choice examination has 5 questions. Each question has three alternative answers of which exactly one is correct. The probability that a student will get 4 or more correct answers just by guessing is

Assuming human pupil to have a radius of 0.25 cm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that human eye can resolve at 500 nm wavelength is :

Let $y(x)$ be the solution of the differential equation $(xgx)dxdy +y=2xgx,(x≥1)$ Then $y(e)$ is equal to :

Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion the average time of collision between molecules increases as $V_{q}$, where V is the volume of the gas. The value of q is : $(γ=C_{v}C_{p} )$

In Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg of $AgBr$. The percentage of bromine in the compound is: (at. Mass Ag = 108, Br = 80)

The number of integers greater than $6,000$ that can be formed, using the digits $3,5,6,7and8,$ without repetition, is :

$(lim)_{x→0}((1−cos2x)xtan4x3+cosx )$is equal to