Modern's ABC of +2 Sample Papers

Objective and Very Short Type Questions with Answers

• A point charge of 5 x 10^-8 C experiences a force of 2.5 N. The electric potential gradient at that point is calculated to be 5 x 10^7 N/C.

• The dimension for electric permittivity is represented as ML^-1T^-3A^1.

• For two capacitors connected in parallel with an equivalent capacitance of 16 µF and in series with 3 µF, possible capacitances include pairs such as 4 µF and 12 µF.

• The force F between two parallel conductors, when the current is doubled and the distance halved, increases to 4F due to the relationship of current and distance in electromagnetic theory.

• The equivalent capacitance in a specified circuit arrangement may yield options such as 0.2 µF.

• The force between two charges of magnitude Q1 and Q2 separated by distance r, originally 25 N, can be reduced to 5 N by changing their separation to r/√5.

• The electric potential at a point is measured in units of Nm/C.

• If the potential difference across a conductor is doubled, the heat generated in one second will increase by four times.

• The capacity of a spherical conductor with a radius of 10 m can reach 9 x 10^9 farads.

• The expression for energy stored in a capacitor is given by 1/2 CV², which is a fundamental concept in capacitor technology.

• An electron accelerated through a potential difference of 200 V gains energy equivalent to 200 eV.

• When four capacitors, each with a capacitance of 0.5 µF, are connected in parallel, the total capacitance becomes 2 µF, illustrating the additive nature of capacitance in parallel configurations.