What is the current $I_1$ in this circuit diagram?

 

Use Kirchhoff’s first law to calculate the unknown currents in the examples in Figure. In each example states the direction of the current.

Use Kirchhoff's first law to calculate the unknown currents in the examples in Figure. In each example states the direction of the current.

Use Kirchhoff’s first law to calculate the unknown currents in the examples in Figure. In each example states the direction of the current.

Use Kirchhoff's first law to calculate the unknown currents in the examples in Figure. In each example states the direction of the current.

This diagram shows a part of a circuit.

Copy the circuit and write in the currents at $\mathrm{X}$ and at $\mathrm{Y}$, and show their directions. 

Look at this circuit.

Determine the unknown potential difference (or differences) in each case.  

Look at this circuits.

Determine the unknown potential difference (or differences) in each case.  

Determine the unknown potential difference (or differences) in each case.