Spring Semester Performance Final Practice

• gets weaker
  

• gets stronger
  

• changes unpredictably
  

• does not change
  

Two charges pull on each other with 4.0 µN of force. If one charge is replaced with a charge 8× as big, and the distance is changed to 4× as much, the charges will pull on each other with --- of force.

• 2.0 µN

• 8.0 µN

• 4.0 µN

• 16.0 µN

Suppose two electrically-charged objects exert a force on one another. If one object has its charge change to 1/5 its original charge, and the distance is changed to 3 times its original distance, the new force will be ___ times the original force.

Mathematical Equivalence

ON

What is current measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

If the battery produced 12.6 Volts and there was a 6 Ohm resistor, what would be the current?

• 2.1 Amps

• 2.4 Amps

• 1.71 Amps

• 15 Amps

A circuit with 3 resistors, 20 Ohms, 10 Ohms, and 20 Ohms are in series. What is the total resistance?

• 43 Ohms
• 50 Ohms
• 60 Ohms
• 33 Ohms

What is the power of a 20V bulb with 5A through it?

• 100W
• 100V
• 6.3W
• 6.3A

This is an example of a _______ circuit

• open

• series

• parallel

• switch

What is the total resistance of this circuit?

• 9.6 Ω

• 40 Ω

• 0.104 Ω

• 8 Ω

If the wavelength of the wave shown is 4.8 m, and it travels at 24 m/s, what is the frequency of this wave?

• 0.2 Hz

• 115.2 Hz

• 12 Hz

• 5.0 Hz