Electrostatics And Current Electricity Mock Tests

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

Choose the group of incorrect statement(s) formed from the following: (i) The ammeter used to measure current in a circuit is to be connected in series. (ii) An ammeter should have very low resistance. (iii) An ammeter should have very high resistance. (iv) Connecting ammeter in series will not lead to any change in the current present before.

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

A charge of +5 μC is placed at a distance of 0.3 m from a charge of -3 μC in air. The force between them is:

The SI unit of electric dipole moment is:

A wire of resistance 4 Ω is stretched to double its length. The new resistance will be:

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