COD1101_Final Exam

What type of circuit is pictured?

• series

• Parallel

is the opposition to the flow of charges in a material.

• Resistance

• Voltage

• Time

• Current

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

• It will get brighter

• It will stay the same brightness

• It will go out

• Nothing will happen

If lamp 2 is unscrewed from its holder, what will happen to lamp1?

• It will stay lit

• It will go out

• It will get dimmer

• It will dissapear

12. An overhead wire has a potential difference of 30,000 volts. If the current flowing through the wire is 1,000 amperes, what is the resistance of the wire?

• 0.033 ohms

• 30 ohms

• 3.0 x 10^7 ohms

• 3.0 x 10^8 ohms

"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

An electrical junction has four wires A, B, C and D connected to it. Wire A carries 7A going in, wire B carries 5 A going out and wire C carries 2 A going in. What does wire D carry?

• 10 A going out

• 5 A going out

• 4 A going in

• 4 A going out

Which statement is correct?

• The current in parallel resistors is always equal.

• The sum of the electric potential differences (or voltages) around a loop add to 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

Current through each resistor when they are connected in series is

• different

• same

• decreasing

• increasing