A parallel plate air capacitor is connected to battery. After charging fully, the battery is disconnected and the plates are pulled further apart. The strength of the electric field inside the capacitor would
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Three capacitors each of capacity 4 μF are to be connected in such a way that the effective capacitance is 6 μF. This can be done by
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(a) connecting two in parallel […]
The potential of a large liquid drop when eight liquid drops are combined is 20 V. Then the potential of each single drop was
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(a) 10 V (b) 7.5 V (c) 5 […]
Two identical charges repel each other with a force equal to 10 mgwt they are 0.6 m apart in air. (g=10 ms⁻²). The value of each charge is
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(a) 2 mC (b) […]
Two identical capacitors each of capacitance 5 mF are charged potentials 2 kV and 1 kV respectively. The -ve ends are connected together. When +ve ends are also connected together, the loss of energy of […]
Two spherical conductors A and B of radii 1 mm and 2 mm are separated by a distance of 5 cm and are uniformly charged. If the spheres are connected by a conducting wire, then […]
An electric dipole of moment p is lying along a uniform electric field E. The work done in rotating the dipole by 90° is
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(a) pE (b) √2 pE (c) pE / […]
A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a […]
The voltage of clouds is 4×10⁶ volt with respect to ground. In a lightening strike lasting 100 m sec, a charge of 4 coulombs is delivered to the ground. The power of the lightening strike […]
The order of the electric field near the earth’s surface is
Options
(a) 100 v/m (b) 500 v/m (c) 200 v/m (d) none of these
Correct Answer:
100 v/m
Explanation:
The electric field […]
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