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What Are Spores? Give Definition & Types?

asked Mar 30, 2022 in 10th science by varun (6.7k points)

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What is permittivity of free space, permittivity and relative permittivity.

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

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What is the force between two 1C charges separated by 1m?

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

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True or false. Write reasons

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A charged metallic sphere A is suspended by a nylon thread. Another charged metallic sphere B held by an insulating handle is brought close to A such that the distance between their centres is 10 cm, as shown in Fig. (a). The resulting repulsion of A is noted (for example, by shining a beam of light and measuring the deflection of its shadow on a screen). Spheres A and B are touched by uncharged spheres C and D respectively, as shown in Fig. (b). C and D are then removed and B is brought closer to A to a distance

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

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Consider three charges q1 , q2 , q3 each equal to q at the vertices of an equilateral triangle of side l. What is the force on a charge Q (with the same sign as q) placed at the centroid of the triangle, as shown

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

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Consider the charges q, q, and –q placed at the vertices of an equilateral triangle, as shown in Fig. . What is the force on each

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

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An electron falls through a distance of 1.5 cm in a uniform electric field of magnitude 2.0 × 104 N C–1 [Fig. (a)]. The direction of the field is reversed keeping its magnitude unchanged and a proton falls through the same distance [Fig. (b)]. Compute the time of fall in each case. Contrast the situation with that of ‘free fall under

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

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Two charges ±10 µC are placed 5.0 mm apart. Determine the electric field at a point P on the axis of the dipole 15 cm away from its centre O on the side of the positive charge, as shown in Fig. ,

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

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Two charges ±10 µC are placed 5.0 mm apart. Determine the electric field at a point Q, 15 cm away from O on a line passing through O and normal to the axis of the dipole, as shown in fig.

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

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The electric field components in Fig. are Ex = αx 1/2 , Ey = Ez = 0, in which α = 800 N/C m1/2. Calculate the flux through the

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

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The electric field components in Fig. are Ex = αx 1/2 , Ey = Ez = 0, in which α = 800 N/C m1/2. Calculate the charge within the cube. Assume that a = 0.1

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

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An electric field is uniform, and in the positive x direction for positive x, and uniform with the same magnitude but in the negative x direction for negative x. It is given that E = 200 `hati` N/C for x > 0 and E = –200` hati` N/C for x < 0. A right circular cylinder of length 20 cm and radius 5 cm has its centre at the origin and its axis along the x-axis so that one face is at x = +10 cm and the other is at x = –10 cm (Fig. ).

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

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An electric field is uniform, and in the positive x direction for positive x, and uniform with the same magnitude but in the negative x direction for negative x. It is given that E = 200 `hati` N/C for x > 0 and E = –200` hati` N/C for x < 0. A right circular cylinder of length 20 cm and radius 5 cm has its centre at the origin and its axis along the x-axis so that one face is at x = +10 cm and the other is at x = –10 cm (Fig. ).

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

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An early model for an atom considered it to have a positively charged point nucleus of charge Ze, surrounded by a uniform density of negative charge up to a radius R. The atom as a whole is neutral. For this model, what is the electric field at a distance r from the

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

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Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. If the charge on each is 6.5 × 10–7 C? The radii of A and B are negligible compared to the distance of separation. (a)What is the mutual force of electrostatic

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

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Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. If the charge on each is 6.5 × 10–7 C? The radii of A and B are negligible compared to the distance of separation. Suppose the spheres A and B in

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

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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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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

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

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A paisa coin is made up of Al−Mg alloy and weighs 0.75g. It has a square shape and its diagonal measures 17mm. It is electrically neutral and contains equal amounts of positive and negative charges. Treating the paisa coins made up of only Al, find the magnitude of an equal number of positive and negative

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

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