Pick a topic on the left, open a problem and check the solution hint by hint.
A resistor $R_1 = 4$ Ω is connected in series with two resistors $R_2 = 6$ Ω and $R_3 = 3$ Ω connected in parallel (see the circuit). A voltage $U = 24$ V is applied to the ends of the whole section. Find the current in each resistor and the voltage across $R_1$.
Find the work done by an electric current in a time of $t = 5$ minutes at a voltage of $U = 220$ V and a current of $I = 2$ A.
Three resistors of resistance $R = 2$ ohm each are connected in parallel. Find the total resistance of the combination.
A current of strength $I = 3$ A flows through a resistor of resistance $R = 20$ ohm. Find the power dissipated in the resistor.
Two resistors of resistance $R_1 = 4$ ohm and $R_2 = 4$ ohm are connected in series. Find the total resistance of the combination.
Two resistors of resistance $R_1 = 6$ ohm and $R_2 = 6$ ohm are connected in parallel. Find the total resistance of the combination.
A current of strength $I = 2$ A flows for a time $t = 10$ s through a conductor of resistance $R = 5$ ohm. Find the quantity of heat released in the conductor.
A resistor of resistance $R = 10$ ohm is connected to a source of voltage $U = 20$ V. Find the current flowing through the resistor.