Class 12th

Identify the incorrect statement.

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High density polythene is chemically inert

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Class 12th Physics

A rectangular coil of wire of $500$ turns of area $10 * 5 c m^{2}$ carries a current of $2 A$ in a magnetic field of induction $2 * 10^{- 3} T$ . If the plane of the coil is parallel to the field. The torque on the coil is $(i n N m)$

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Contributor-Level 10

Torque on a bar magnet in external uniform magnetic field is

$\overset{?}{τ} = \overset{?}{M} * \overset{?}{B}$

$\overset{?}{τ} = N I A B \sin ? 90^{0}$

$= 500 * 2 * 50 * 10^{- 4} * 2 * 10^{- 3}$

$= 0.01 N m$

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Nitroethane when heated above 573 K yields

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Class 12th Physics Ray Optics and Optical Instruments

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$C H_{3} C H_{2} N O_{2} \overset{573 K}{\to} C H_{2} = C H_{2} + H N O_{2}$

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An object of height 1.5cm is placed on the axis of a convex lens of focal length 25cm. A real image is formed at a distance of 75cm from the lens. The size of the image will be

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Raj Pandey

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In which of the following alcohols, dehydration takes place most readily in acidic medium?

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Class 12th Physics Wave Optics

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Kindly consider the following figure

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The superposition of waves can result in

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Interference is the result of the superposition of waves.

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Consider the following reaction

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Kindly consider the following figure

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Class 12th Physics

The correct expression in accordance with Gauss's law for magnetism is

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Class 12th Physics Alternating Current

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According to Gauss's law magnetism

$? \overset{?}{B} . \overset{?}{d s} = 0$

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Class 12th Physics

A circular beam of light of diameter d=2cm falls on a plane surface of glass. The angle of incidence is 60⁰ and refractive index of glass is $μ = 3 / 2$ . The diameter of the refracted beam is:

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Raj Pandey

Contributor-Level 9

Please find the answer below

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A capacitor is of capacity $C$ and reactance $X$ . If capacitance and frequency become triple then reactance will be

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