Kirchhoff's Law

Current is shared between two resistors of 3 Ω and 6 Ω, if the current in the 6 Ω is 12 A what is the total incoming current?

• 24 A

• 36 A

• 18 A

• 72 A

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

Refer to the circuit diagram shown. What is the amount of voltage that is used up by resistor  $A$  ?

•  $10\ V$  

•  $6.47\ V$  

•  $5\ V$  

•  $3.53\ V$  

Tags

NGSS.HS-PS2-5

What instrument is used to measure the electric current that flows through a wire?

• voltmeter

• galvanometer

• ammeter

• electric meter

Analysis of a circuit produces two loop equations:

10x + 30y = 7 and 40x - 20y = 0

What are the currents x and y?

• x = 50 and y = 10

• x = 0.2 and y = 0.1

• x = 0.01 and y = 0.02

• y = 0.2 and x = 0.1

Current entering and leaving a point in a circuit should be

• equal

• decreasing

• increasing

• variable

Kirchhoff's 1st law is consequence of law of conservation of

• energy

• charge

• momentum

• power

Calculate the current at the point A

• 6 A

• 7 A

• 8 A

• 9 A

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