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Class 12th

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3 months ago

Class 12th Physics Alternating Current

The value of alternating emf (E) in the given circuit will be

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alok kumar singh

Contributor-Level 10

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New answer posted

3 months ago

Class 12th Physics Ray Optics and Optical Instruments

A farsighted person cannot focus distinctly objects closer than 100 cm. The lens that will permit him to read from a distance of 50 cm, will have a focal length:

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alok kumar singh

Contributor-Level 10

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New answer posted

3 months ago

Class 12th Physics

Figure shows four plates each of area A and separated from another by a distance d. What is the capacitance between P and Q?

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alok kumar singh

Contributor-Level 10

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New answer posted

3 months ago

Class 12th Physics Electric Charge and Field

A charged particle of mass m and charge q is released from rest in a uniform electric field E. The KE of particle after time t is:

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alok kumar singh

Contributor-Level 10

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Class 12th Physics

The work function of a metal is w₀and l is wavelength of incident radiation. There is no emission of photoelectron when

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alok kumar singh

Contributor-Level 10

For no emission of electron

λ > λ₀

Q λ_{0 =}hc/w_0,so λ > hc/w₀

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New answer posted

3 months ago

Class 12th Physics Wave Optics

Two pillars are at distance of 6.28 m from each other. What should be the maximum distance of an observer from pillar to see them separately?

(qR = 1 arc minute)

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Raj Pandey

Contributor-Level 9

qR =1/60º for human eye

⇒x = 21.6 km

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3 months ago

Class 12th Physics

The work function of a metal is w0 and l is wavelength of incident radiation. There is no emission of photoelectron whenThe work function of a metal is w0 and l is wavelength of incident radiation. There is no emission of photoelectron when\

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Raj Pandey

Contributor-Level 9

For no emission of electron

λ > λ0

0 0

New answer posted

3 months ago

Class 12th Moving Charges and Magnetism

What are different types of electricity?

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Pallavi Pathak

Contributor-Level 10

There are two types of electricity - static and current. The current electricity is divided into Alternating Current (AC) and Direct Current (DC). Based on the production methods, electricity is divided into - heat, chemical, pressure, light and magnetism.

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3 months ago

Class 12th NEET

What are the various types of power supply?

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Pallavi Pathak

Contributor-Level 10

There are four types of power supply - switch-mode power supplies, linear power supplies, linear power supplies, and programmable power supplies

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3 months ago

Class 12th Physics

Explain Biot Savart law in Class 12 Physics.

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Pallavi Pathak

Contributor-Level 10

According to this law, at any point, magnetic field due to a tiny current element is directly proportional to the current element length.

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