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A point charge causes an electric flux of –1.0 × 103 `Nm^2` /C to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. If the radius of the Gaussian surface were doubled, how much flux would pass through the

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

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A point charge causes an electric flux of –1.0 × 103 `Nm^2` /C to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. What is the value of the point

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

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A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward, what is the net charge on the

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

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A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 µC/m2 . Find the charge on the

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A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 µC/m2 . What is the total electric flux leaving the surface of the

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

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An infinite line charge produces a field of 9 × 104 N/C at a distance of 2 cm. Calculate the linear charge

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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 and of magnitude 17.0 × 10–22 C/`m^2` . What is E:(i) in the outer region of the first plate,(ii) in the outer region of the second plate,(iii) between the

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

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An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55 × 104 `NC^(–1)` (Millikan’s oil drop experiment). The density of the oil is 1.26 g `cm^(–3)`. Estimate the radius of the drop. (g = 9.81 m`cm^(–2)`; e = 1.60 × 10–19

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

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Which among the curves shown in Fig. cannot possibly represent electrostatic field lines?

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Which among the curves shown in Fig. cannot possibly represent electrostatic field lines?

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

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Which among the curves shown in Fig. cannot possibly represent electrostatic field lines?

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

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Which among the curves shown in Fig. cannot possibly represent electrostatic field lines?

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In a certain region of space, electric field is along the z-direction throughout. The magnitude of electric field is, however, not constant but increases uniformly along the positive z-direction, at the rate of 105 NC–1 per metre. What are the force and torque experienced by a system having a total dipole moment equal to 10–7 Cm in the negative z-direction

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(i) A conductor A with a cavity as shown in Fig. is given a charge Q. Show that the entire charge must appear on the outer surface of the conductor.(ii) Another conductor B with charge q is inserted into the cavity keeping B insulated from A. Show that the total charge on the outside surface of A is Q + q [Fig.(b)].(iii) A sensitive instrument is to be shielded from the strong electrostatic fields in its environment. Suggest a possible

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A hollow charged conductor has a tiny hole cut into its surface. Show that the electric field in the hole is `(σ/2ε_0 )hatn` , where `hatn` is the unit vector in the outward normal direction, and σ is the surface charge density near the

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Obtain the formula for the electric field due to a long thin wire of uniform linear charge density E without using Gauss’s law. [Hint: Use Coulomb’s law directly and evaluate the necessary

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It is now believed that protons and neutrons (which constitute nuclei of ordinary matter) are themselves built out of more elementary units called quarks. A proton and a neutron consist of three quarks each. Two types of quarks, the so called ‘up’ quark (denoted by u) of charge + (2/3) e, and the ‘down’ quark (denoted by d) of charge (–1/3) e, together with electrons build up ordinary matter. (Quarks of other types have also been found which give rise to different unusual varieties of matter.) Suggest a possible quark composition of a proton and

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

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(i) Consider an arbitrary electrostatic field configuration. A small test charge is placed at a null point (i.e., where E = 0) of the configuration. Show that the equilibrium of the test charge is necessarily unstable.(ii) Verify this result for the simple configuration of two charges of the same magnitude and sign placed a certain distance

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

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A particle of mass m and charge (–q) enters the region between the two charged plates initially moving along x-axis with speed vx (like particle 1 in Fig. ). The length of plate is L and an uniform electric field E is maintained between the plates. Show that the vertical deflection of the particle at the far edge of the plate is `(qEL^2)/(2m v_x^2)`. Compare this motion with motion of a projectile in gravitational field discussed in Section 4.10 of Class XI Textbook of

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In Fig., two positive charges q2 and q3 fixed along the y axis, exert a net electric force in the + x direction on a charge q1 fixed along the x axis. If a positive charge Q is added at (x, 0), the force on

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

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