Question

If you measure the current in a circuit and the voltage across the circuit, can you predict the
resistance in the circuit? Explain how.

Answer 1

Answer:

Sure, you can.

Explanation:

» Record the ammeter reading and voltimeter reading as I and V respectively.

» Then, from ohm's law [ voltage is proportional to current ]

${ \rm{V \: \alpha \: I}}$

» Input the constant of proprtionality, from ohm's law, resistance is constant [ R ≠ 0 ]

${ \rm{V = IR}}$

• V is voltage
• I is current
• R is resistance

${ \boxed{ \boxed{ \rm{ \:R = \frac{V}{I} \: \: }}}}$