Physics 11

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

Which of the following equations represent the current I in the circuit?

• 
• 
• 
• 
• 

Which of the equations is valid for the circuit below?

• 2 – I₁ – 2I₂ = 0

• 2 – 2I₁ – 2I₂ – 4I₃ = 0

• 2 – I₁ – 4 – 2I₂ = 0

• I₃ – 4 – 2I₂ + 6 = 0

• 2 – I₁ – 3I₃ – 6 = 0

What is the loop rule for the outside loop?

• 8 V - I₃(4) + I₁(1) = 0

• 4 V - I₃(4) + I₁(1) = 0

• 8 V - I₃(4) - I₁(1) = 0

• 4 V - I₃(2) + I₁(1) = 0

Study the given diagram. If I1 = 2 A, I2 = 10 A, I3 = 4 A, and I4 = 5 A, then find (I5 - I1).

• 12A

• 1A

• 3A

• 2A

The current in the resistor X is 2.0 A and the current in the 6.0 Ω resistor is 0.5 A. Calculate the resistance of resistor Y

• 6.0 Ω

• 2.0 Ω

• 4.0 Ω

• 3.0 Ω

Calculate the current at the point B

• 6 A

• 7 A

• 8 A

• 9 A

Calculate the current at the point A

• 6 A

• 7 A

• 8 A

• 9 A

Calculate the current at the point E

• 6 A

• 7 A

• 8 A

• 9 A

Using Kirchhoff's Law, what is the current at point I? Mark your answer to the nearest tenth.