Static Electricity

The SI unit of electric charge is ...

According to Coulomb's law, the electric force between two point charges ...

The direction of the electric field around a positive charge is ...

The value of Coulomb's constant $k$ in vacuum is ...

The SI unit of electric field strength is ...

Electric potential is a ... quantity.

Two charges of $2\mu \text{C}$ and $3\mu \text{C}$ are separated by $3\text{cm}$. If $k=9\times 10^9\text{N}\cdot {\text{m}}^2/{\text{C}}^2$, the magnitude of the Coulomb force between them is ...

The electric field strength at a distance of $0.3\text{m}$ from a $3\mu \text{C}$ charge is ...

The electric potential at a distance of $0.3\text{m}$ from a $3\mu \text{C}$ charge is ...

If the distance between two charges is doubled, the Coulomb force becomes ...

A capacitor stores $6\mu \text{C}$ of charge when the potential difference is $12\text{V}$. Its capacitance is ...

Two capacitors of $3\mu \text{F}$ and $6\mu \text{F}$ are connected in series. Their total capacitance is ...

Two capacitors of $3\mu \text{F}$ and $6\mu \text{F}$ are connected in parallel. Their total capacitance is ...

A $2\mu \text{F}$ capacitor is charged to a potential difference of $100\text{V}$. The stored energy is ...

Charges of $4\mu \text{C}$ and $9\mu \text{C}$ are separated by $10\text{cm}$. The point between them where the electric field is zero is ... from the $4\mu \text{C}$ charge.

A parallel-plate capacitor has a plate area of $0.02{\text{m}}^2$ and a plate separation of $1\text{mm}$. If ${\epsilon }_0=8.85\times 10^{-12}\text{F/m}$, its capacitance is ...

A $2\mu \text{C}$ charge is moved from a point at $100\text{V}$ to a point at $300\text{V}$. The work required is ...

If each of two charges is doubled and their separation is tripled, the Coulomb force becomes ...

A charged capacitor is disconnected from its voltage source. If the plate separation is increased so that its capacitance is halved, the stored energy becomes ...

Two charges $+q$ and $-q$ are separated by $2a$. The electric field strength at the midpoint between them is ...