Calculate the number of electrons in $100$ grams of ${\mathrm{CO}}_2$.

The figure shows the graph of the current in a discharging circuit of a capacitor through a resistor of resistance $10 \mathrm{\Omega }$:

Find the initial potential difference across the capacitor.

A capacitor of capacitance 1 µF is discharging through a resistance. Initial potential difference across capacitor is 12 V. At $\mathrm{t}=\frac{1}{10}\mathrm{s}$ potential difference across capacitor becomes 6V. Find value of resistance R.

Find V_A- V_B in the given diagram :-

Calculate charge on 2µF capacitor :-

A capacitor of 10 µF capacity is connected to 12V battery and a resistance. Calculate work done by battery to increase the potential of capacitor from 5 V to 5.1 V.