A 10 ohm resistor is connected to a 20 V source. Find the current — Physics problems | PhysLabo
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Current through a resistor

Easy 10 grade Electricity / Electric Current
Problem statement

A resistor of resistance $R = 10$ ohm is connected to a source of voltage $U = 20$ V. Find the current flowing through the resistor.

Given
  • $R = 10$ ohm
  • $U = 20$ V
  • $I = ?$
Hints
Hint 1 / 2
Ohm's law for a circuit segment links current, voltage and resistance.
Hint 2 / 2
Divide the voltage by the resistance.
Solution

Ohm's law for a circuit segment: $I = U/R$.

$$I = \frac{U}{R} = \frac{20}{10} = 2 \text{ A}$$

Answer

$I = 2$ A

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