Potential at a point x-distance from the centre inside the conducting sphere of redius r and carrying a charge Q is
Options
(a) Q/R (b) Q/x (c) Q/x² (d) xQ
Correct Answer:
xQ
A total charge of 5µC is distributed uniformly on the surface of the thin walled semispherical cup. If the electric field strength at the centre of the hemisphere is 9×10⁸NC⁻¹, then the radius of the […]
The distance of the closest approach of an alpha particle fired at a nucleus with kinetic energy K is r₀. The distance of the closest approach when the α particle is fired at the same […]
A parallel plate capacitor has 91 plates, all are identical and arranged with same spacing between them. If the capacitance between adjacent plates is 3pF. What will be the resultant capacitance?
Options
(a) […]
An isolated sphere has a capacitance of 50pF. What would be the radius of the sphere?
Options
(a) 90cm (b) 45cm (c) 11.50cm (d) 5.75cm
Correct Answer:
45cm
Explanation:
As potential of spherical charge […]
Calculate the charge on equivalent capacitance of the conbination shown in figure between the points P and N
Options
(a) 450 μC (b) 225 μC (c) 350 μC (d) 900 μC
Correct Answer: […]
The electric field in a certain region is acting radially outward and is given by E=Ar. A charge contained in a sphere of radius a centred at the origin of the field will be given […]
A spherical conductor of radius 2 m is charged to a potential of 120 V. It is now placed inside another hollow spherical conductor of radius 6 m. Calculate the potential to which the bigger […]
An electric dipole is placed at an angle 30°with an electric field intensity 2×10⁵N/C. It experiences a torque equal to 4N-m. The charge on the dipole, if the dipole length is 2cm is,
Options […]
A condenser of capacity C is charged to a potential difference of V₁. The plates of the condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the […]
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