Physics

Problem

In a circuit with a constant supply voltage, an adjustable resistor is first set to

150\,\Omega

, and the ammeter reads

80\,\text{mA}

. Keeping the supply voltage unchanged, the resistor is reset to

60\,\Omega

. Determine the new current reading. a)

0.032\ \text{A}

0.08\ \text{A}

0.20\ \text{A}

0.12\ \text{A}