Kirchhoff's Laws

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

Current entering and leaving a point in a circuit should be

• equal

• decreasing

• increasing

• variable

Current through each resistor when they are connected in series is

• different

• same

• decreasing

• increasing

If a billion electrons enter a point in 1 s, then number of electrons

leaving that point in 1 s are

• 2 billion

• 3 billion

• 1 billion

• 10 billion

Kirchhoff's 2nd law deals with

• current in circuit

• voltage in circuit

• e.m.f in circuit

• voltage in circuit and e.m.f in circuit

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

• energy

• charge

• momentum

• power

Kirchhoff's 1st law deals with

• current in circuit

• voltage in circuit

• e.m.f in circuit

• voltage in circuit and e.m.f in circuit

• 18 Ω

• 15 Ω

• 12 Ω

• 10 Ω

Calculate the current at the point A

• 6 A

• 7 A

• 8 A

• 9 A

Calculate the current at the point B

• 6 A

• 7 A

• 8 A

• 9 A

Tags

NGSS.HS-PS2-5