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in Electronic Devices answer selected Apr 10 26 views

For an extrinsic semiconductor if doping concentration is increases then.

1 answer

in Ray Optics and Optical Instruments answered Apr 10 26 views

Relation between radius of curvature & focal length of a convex mirror is.

1 answer

in Rotational Motion answered Apr 10 39 views

I1 = Moment of Inertia of ring of mass M and radius R about its diameter. I2 = Moment of Inertia of Disc of mass M

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in Dual Nature of Matter and Radiation answered Apr 10 40 views

Statement-1: de-Broglie wavelength of proton varies inversely with linear momentum. Statement-2: As λ increases, energy

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in Communication Systems answered Apr 10 43 views

Vm = 20sin[100πt+π/4], Vc = 80sin[104t+π/6], For amplitude modulation wave find out percentage modulation index.

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in Wave Optics answered Apr 10 196 views

If intensity after passing through a polaroid is 100 Lumen. Now this same polaroid is rotated by 30° about it's axis

1 answer

in Kinetic Theory of Gases answered Apr 10 23 views

Statement-1: Rotational KE of a gas molecule follows Maxwell's speed distribution curve. Statement-2: Rotational KE

1 answer

in Electromagnetic Induction and Alternating Currents answered Apr 10 20 views

In a given AC series circuit containing elements R, L and C & source voltage = 220v, it is known that if L alone is

1 answer

in Physics and Measurement answered Apr 10 21 views

Find out dimension of 1/4πε0 e2/hc where e : electronic charge, ε0 = permittivity of free space, h : plank constant

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in Dual Nature of Matter and Radiation answered Apr 10 31 views

Proton and electron are moving along circular path with same speed. Find out ratio of debroglie wavelength that is λe/λp

1 answer

in Wave Optics answered Apr 10 33 views

Sun light is diffracted through a circular aperture of diameter 0.1μm. If diameter is slightly increased then

1 answer

in Communication Systems answered Apr 10 35 views

In an amplitude modulated wave, message wave frequency fm and carrier wave frequency fc. Find out wavelength

1 answer

in Gravitation answered Apr 10 22 views

Time period of simple pendulum at a planet is 2 sec. Length of simple pendulum is 2 meter. Find the value of g

1 answer

in Some Basic Concepts of Chemistry answered Mar 7 28 views

The ration of the mass percentages of 'C & H' and 'C & O' of a saturated acyclic organic compound 'X' are 4 : 1

1 answer

in Atomic Structure answered Mar 7 80 views

The work function of sodium metal is 4.41 × 10–19 J. If photons of wavelength 300 nm are incident on the metal,

1 answer

in Classification of Elements and Periodicity in Properties answered Mar 7 56 views

Three elements X, Y and Z are in the 3rd period of the periodic table. The oxides of X, Y and Z, respectively

1 answer

in Classification of Elements and Periodicity in Properties answered Mar 7 45 views

Two elements A and B have similar chemical properties. They don't form solid hydrogencarbonates, but react with nitrogen

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in Chemistry In Everyday Life answered Mar 7 48 views

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be:

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in Chemical Bonding and Molecular Structure answered Mar 7 60 views

The shape/structure of [XeF5]– and XeO3F2, respectively are :

1 answer

in Coordination Compounds answered Mar 7 40 views

The one that is not expected to show isomerism is:

The one that is not expected to show isomerism is: (1) [Ni(NH3)2Cl2] (2) [Ni(NH3)4(H2O)2]2+ (3) [Ni(en)3]2+ (4) [Pt(NH3)2Cl2]

1 answer

in Chemical Bonding and Molecular Structure answered Mar 7 87 views

The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if (any)?

2 answers

in Atomic Structure answered Mar 7 92 views

The number of subshells associated with n = 4 and m = –2 quantum numbers is:

1 answer

in Solutions answered Mar 7 32 views

The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution.

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in Surface Chemistry answered Mar 7 44 views

Amongst the following statements regarding adsorption, those that are valid are: (a) ΔH becomes less negative

1 answer

in Chemistry answered Mar 7 28 views

Cast iron is used for the manufacture of :

Cast iron is used for the manufacture of : (1) wrought iron and steel (2) wrought iron, pig iron and steel (3) wrought iron and pig iron (4) pig iron, scrap iron and steel

1 answer

in Chemistry answered Mar 6 133 views

Which one of the following reactions does not come under hydrolysis type reaction ?

1 answer

in Complex Numbers and Quadratic Equations answered Mar 6 145 views

The imaginary part of (3 + 2√−54)^1/2 − (3 − 2√−54)^1/2 can be

1 answer

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