Electrostatics And Current Electricity Mock Tests

A capacitor of capacitance C is charged to a potential V. The energy stored in the capacitor is:

A parallel plate capacitor is connected to a battery supplying constant voltage difference such that it accumulates charge Q. While being connected, if the separation d between the plates is increased:

Let Eᵢ, Nᵢ, Iᵢ with i = 1, 2 denote respectively the emf, number of turns, and the current in the primary and secondary coils of an ideal transformer. Then:

Three resistors of 3 Ω each are connected in parallel. The equivalent resistance is:

Three capacitors of capacitances 2 μF, 3 μF and 6 μF are connected in parallel. The equivalent capacitance is:

A copper wire of length 1 m and cross-sectional area 1 mm² has a resistance of 0.17 Ω. The resistivity of copper is:

A tiny electric dipole of dipole moment p k̂ is placed at the origin. The electric fields at two far away points (b, 0, 0) and (0, 0, b) are:

A capacitor of capacitance 10 μF is charged to 100 V. The energy stored in the capacitor is: