The positive of a resistor is where the current enters the resistor. The negative of a resistor is where the current leaves the resistor. The longer terminal of a battery is positive while the shorter terminal is negative. When crossing an element from positive to negative, we use a negative sign. When crossing an element from negative to positive we use positive sign.
The voltage across a resistor, V= IR.
The ammeter in the figure reads 3.0 A.
(a) Find I2. Express your answer using two significant figures, in Amps.
(b) Find ε. Express your answer using two significant figures, in Volts.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Kirchhoff's Loop Rule concept. You can view video lessons to learn Kirchhoff's Loop Rule. Or if you need more Kirchhoff's Loop Rule practice, you can also practice Kirchhoff's Loop Rule practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Poling's class at UMN.