Kirchhoff's Rules and Circuits

An electrical junction has three wires A, B and C connected to it. Wire A carries 4.2 A going in, wire B carries 2.6 A going out. What does wire C carry?

• 1.6 A going in

• 1.6 A going out

• 6.8 A going in

• 6.8 A going out

Select the correct statement:

• The current in parallel resistors is always equal.

• The sum of the sources of EMF and volt-drops in a closed loop is zero.

• The sum of the currents in a closed loop is zero.

• The sum of the voltages at a node is zero.

For the circuit shown, the resistances are R₁ > R₂ > R_3. What is true about the current through each resistor?

• I₁ = I₂ = I₃

• I₁ > I₂ > I₃

• I₁ > I₃ > I₂

• I₁ < I₃ < I₂

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

"The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what?

• Ohm's Law

• Kirchhoff's Voltage Law

• Kirchhoff's Current Law

• Bolen's Law

"The total current in a parallel circuit equals the sum of the individual branch currents."

• Ohm's Law

• Kirchhoff's Voltage Law

• Kirchhoff's Current Law

• Bolen's Law

Given the direction of the current shown. Which side of the resistor has the high electric potential energy?

• left side is higher

• right side is higher

Which side of the battery has the higher electric potential energy?

• right side is higher

• left side is higher

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The nano-sized tractor moves a charge across the resistor with the shown current. Will the charge gain or lose energy?

• + ΔV

• - ΔV

• varying potential difference

• Can't tell from the given information.

Is the potential at "B" higher or lower than "A's" potential? (for 3 points)

• "B" is higher than "A"

• "B" is lower than "A"

• Can't tell from the given information.