Electromagnetism Physics PYQs - BITSAT Previous Year Questio

Two small conducting spheres of equal radius have charges +20 \(\mu\) C and \(-\)40 \(\mu\)C respectively and placed at a distance R from each other experience for F₁. If they are brought in contact and separated to the same distance, they experience force F₂. The ratio of F₁ to F₂ is

In the following circuit, assuming point A to be at zero potential, then what is the potential at point B?

In the arrangement shown in figure, when the switch S₂ is open, the galvanometer, shows no deflection for \(l\) = 50 cm when the switch S₂ is closed, the galvanometer shows no deflection for \(l\) = 0.416 m. The internal resistance (r) of 6 V cell is

A charged particle moving in a uniform magnetic field and losses \(16 \%\) of its kinetic energy. The radius of curvature of its path changes by

A dielectric slab of dielectric constant $k=3$ is filling $\frac{3}{4}$ th space of the capacitor.

When capacitor is charged, then \% of total energy stored in dielectric is