Dynamic Electricity

Ohm's law states the relationship ...

The SI unit of electric current is ...

The SI unit of electrical resistance is ...

Electric current is defined as ...

Two resistors of $2\Omega$ and $4\Omega$ are connected in series. Their total resistance is ...

The instrument used to measure electric current is a ...

A $4\Omega$ resistor is connected to a $12\text{V}$ source. The current flowing is ...

Resistors of $4\Omega$ and $6\Omega$ are connected in series to a $12\text{V}$ source. The current in the circuit is ...

Resistors of $6\Omega$ and $3\Omega$ are connected in parallel. Their total resistance is ...

A wire has resistance $R$. If its length is doubled and its cross-sectional area is halved, its resistance becomes ...

An electrical device operates at $220\text{V}$ with a resistance of $44\Omega$. Its power is ...

A $100\text{W}$ lamp is on for $5\text{hours}$. The electrical energy used is ...

Three $3\Omega$ resistors are connected in parallel. Their total resistance is ...

According to Kirchhoff's first law, at a junction ...

A battery with an EMF of $12\text{V}$ and internal resistance $1\Omega$ is connected to an external $5\Omega$ resistor. The terminal voltage is ...

Resistors $4\Omega$ and $12\Omega$ are in parallel, then the combination is in series with a $2\Omega$ resistor. The total resistance is ...

A $300\text{W}$ iron is used $2\text{hours}$ a day for 30 days. If the electricity tariff is Rp1,500 per kWh, the cost is ...

A copper wire has resistivity $1.7\times 10^{-8}\Omega \cdot \text{m}$, length $2\text{m}$, and cross-sectional area $1\times 10^{-6}{\text{m}}^2$. Its resistance is ...

A $3\Omega$ resistor is in series with a parallel branch of $6\Omega$ and $3\Omega$, connected to an $18\text{V}$ source. The total current is ...

A $6\text{V}$ battery with internal resistance $0.5\Omega$ is connected to a $2.5\Omega$ resistor. The power dissipated in the external resistor is ...