Circuits

The total resistance in a parallel circuit is

• less than the smallest resistance
• equal to the average resistance
• equal to the sum of the resistance
• more than the largest resistance

A correct statement of Ohm’s Law is:

• I= V R
• V ∝ I
  
• V = IR
• both b and c

Rank the bulbs in the following circuit according to their brightness, from brightest to dimmest.

•  A > B = C > D
•  A > B = C > D
•  A = D > B = C
•  B = C > A > D

A battery is connected to a resistor. Increasing the resistance of the resistor will

• increase the current in the circuit
• decrease the current in the circuit
• not effect the current in the circuit

The charge carriers in metals are

• electrons
• protons
• positrons
• a mix of protons and electrons