Recent questions tagged #mcq

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A hollow cylinder has a charge q coulomb within it. If `phi` is the electric flux in units of voltmeter associated with the curved surface B, the flux linked with the plane surface A in units of volt-meter will be

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

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An infinitly long thin straight wire has uniform linear charge density of `1/3` c/m . Then, the magnitude of the electric intiensity at a point 18 cm away is .......... `NC^(–1)`

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

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Two points are at distances a and `b (a < b)` from a long string of charge per unit length `lambda`.The potential difference between the points in proportional to

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

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A long string with a charge of `lambda` per unit length passes through an imaginary cube of edge `l`. The maximum possible flux of the electric field through the cube will be

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

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Two Points P and Q are maintained at the Potentials of 10 v and –4 v, respectively. Thework done in moving 100 electrons from P to Q is

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

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The electric Potential V at any Point o (x, y, z all in metres) in space is given by `V = 4x^2` volt. The electric field at the point (1m, 0.2m) in volt/metre is

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

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Charges of `+ 10/3xx10^(-19) C` are placed at each of the four corners of a square of side 8cm. The potential at the intersection of the diagonals is

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

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Three charges 2q, –q, –q are located at the vertices of an equilateral triangle. At the centre of the

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

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In the electric field of a point charge q, a certain charge is carried from point A to B, C, D and E. Then the work done

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

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Three concentric spherical shells have radii a, b and c (a < b < c) and have surface charge densities σ, – σ and σ respectively. If `V_A , V_B` and `V_C` denote the Potentials of the three shells, then for c = a + b, we

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

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The electric Potential at a point P (x, y, z) is given by `V = –x^2y – xz^3 + 4` The electric field `vecE` at that point is

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

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Three particles, each having a charge of 10µc are placed at the corners of an equilateral triangle of side 10 cm. The electrostatic potential energy of the system is (Given `1/(4piepsilon_o) = 9 × 10^9 N.m^2' /'c^2`)

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

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Four equal charges Q are placed at the four corners of a square of each side is ‘a’. Workdone in removing a charge - Q from its centre to infinity is

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

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Two charged spheres of radii R1 and R2 having equal surface charge density. The ratio of their potential is

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

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Two equal charges q are placed at a distance of 2a and a third charge -2q is placed at the midpoint. The potential energy of the system is

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

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Two point charges 100µc and 5µc are placed at points A and B respectively with AB = 40 cm. The work done by external force in displacing the charge 5µc from B to C where BC = 30 cm, angle `ABC = pi/ 2` and `1/(4piepsilon_o)=9xx 10^9 Nm^2' /'c^2`

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

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The electric potential V is given as a function of distance x (metre) by `V = (5x ^2 + 10x – 9)` volt. Value of electric field at `x = 1` is

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

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A sphere of radius 1cm has potential of 8000 v, then energy density near its surfacewill be

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

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If a charged spherical conductor of radius 10cm has potential v at a point distant 5 cmfrom its centre, then the potential at a point distant 15cm from the centre will be

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

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Electric charges of `+10µc, 5µc, –3µc and 8µc` are placed at the corners of a square of side `sqrt2`m the potential at the centre of the square is

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

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