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Charge between Parallel Plates Surface charge density is defined as the charge per unit surface area of surface charge distribution, `i.e. sigma = (dq)/(dS)`Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs having magnitude of `17.0 xx 10^(-22) Cm^(-2)` as shown belowThe intensity of electric field at a point is `E=(sigma)/(epsilon_0)`where, `epsilon_0` = permittivity of free spaceThe ratio of E from right side of plate B at distances 2 cm and 4 cm, respectively

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

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The North-pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of induced current in the conducting plane will

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When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. Explain

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A spherically symmetric charge distribution is characterised by a charge density having the following variations: `rho(r)=rho_o (1-r/R)` for `r < R rho(r)=0` for `r ge R` Where r is the distance from the centre of the charge distribution p, is a constant. The electric field at an internal point (r < R)

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Can a body have a charge of

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In the circuit shown below, the ac source has voltage `v = 20 cosomegat` volts with `omega= 2000 `rad/sec.The amplitude of the current will be nearest

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The figure shows a rod of length `l` with points A and B on it. The rod is moved in a uniform magnetic field `(B_0)` in different ways as shown. In which case potential difference `(V_A–V_B)` between `A & B` is

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A current-carrying circular loop is located in a uniform external magnetic field. If the loop is free to turn, what is its orientation of stable equilibrium? Show that in this orientation, the flux of the total field (external field + field produced by the loop) is

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Graph showing the variation of current versus voltage for a material GaAs is shown in the figure .Identify the region, where Ohm’s law is obeyed.

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

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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

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Two identical charged spheres suspended from a common point by two massless strings of length l are initially a distance `d (d << l )` apart because of their mutual repulsion. The charge begins to leak from both the spheres at a constant rate. As a result the spheres approach each other with a velocity υ . Then function of distance x between them becomes

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When a body is grounded, electrons from the earth flow into the body. This means the body is :

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In series LCR circuit, the plot of `I_max VS ω` is shown in Fig . Find the bandwidth and mark in the

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A magnetic field `2xx 10^(-2) T` acts at right angles to a coil of area `200 cm^2` with 25 turns. The average emf induced in the coil is 0.1 v when it removes from the field in time t. The value of t

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Show that average heat produced during a cycle of AC is same as produced by DC with `I =

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An element ∆ =` ∆x hat i` is placed at the origin and carries a large current I = 10 A (Fig.). What is the magnetic field on the y-axis at a distance of 0.5 m. ∆x = 1

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The force between two charges `0.06 m` apart is `5 N`. If each charge is moved towards each other by `0.04 m`, then the force between them will

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Which of the following statement(s) is/are incorrect regarding the point

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Assertion: A point charge is brought in an electric field, then electric field at a nearby point may increase or decrease. Reason: The electric field is dependent on the nature of

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A card sheet divided into squares each of size 1 mm2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 9 cm) held close to the eye. What should be the distance between the object and the magnifying

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

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