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Ultraviolet light is incident on two photosensitive materials having work function `φ_1 and φ_2 (φ_1 > φ_2 )`. In which of the case will K.E. of emitted electrons be greater?

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Show graphically how the stopping potential for a given photosensitive surface varies with the frequency of incident

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How does the stopping potential applied to a photocell change if the distance between the light source and the cathode of the cell is

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On what factor does the retarding potential of a photocell

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Electron and proton are moving with same speed, which will have more

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A charged rod P attracts rod R where as P repels another charged rod Q. What type of force is developed between Q and

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Which physical quantity has its S.I unit (1) Cm (2)

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Define one

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Why does the electric field inside a dielectric decrease when it is placed in an external electric

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What is the work done in moving a 2 µ C point change from corner A to corner B of a square ABCD when a 10 µ C charge exist at the centre of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Force of attraction between two point electric charges placed at a distance d in a medium is F. What distance apart should these be kept in the same medium, so that force between them becomes

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The distance of the field point on the equatorial plane of a small electric dipole is halved. By what factor will the electric filed

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The Plates of a charged capacitor are connected by a voltmeter. If the plates of the capacitor are moved further apart. What will be the effect on the reading of the

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What happens to the capacitance of a capacitor when a dielectric slab is placed between its

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A solid conducting sphere of radius a has a net positive charge 2Q. A conducting spherical shell of inner radius b and outer radius c is concentric with the solid sphere and has a net charge– Q.The surface charge density on the inner and outer surfaces of the spherical shell will be

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The surface charge density of a thin charged disc of radius R is σ. The value of the electric field at the centre of the disc is sigma/(2in_0)`. With respect to the field the centre, the electric field along the axis at a distance R from the centre of the disc reduces

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In the figure, the net electric flux through the area A is `phi=vecE.vecA` when the system is in air. On immersing the system in water the net electric flux through the

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An electric dipole is placed in a uniform electric field. The dipole will

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Figure shows two charges of equal magnitude separated by a distance 2a. As we move away from the charge situated at x = 0 to the charge situated at `x=2a`, which of the following graphs shows the correct behaviour of electric field

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An uniform electric field E exists along positive x-axis. The work done in moving a charge 0.5 C through a distance 2 m along a direction making an angle 60° with x-axis is 10 J. Then the magnitude of electric field

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