Physics Past Questions and Answers

Calculate the energy stored in 20μF capacitor if the potential difference between the plates is 40 V.

The diagrams above show lines of force in electric fields. In which of the diagrams would a positive test charge experience the least force as it moves from x to y?

What is the electric potential at a point distance r from a proton of charge q placed in a medium of permittivity ε_o?

lf the frequency of the a.c. circuit illustrated is 500Hz/ π what would be the reactance in the circuit?

Which of the following statements is correct about cathode rays? They are fast moving