Electricity TEST REVIEW

Two objects A and B are separated by a distance of 0.5 m, as shown in the figure. What do the electric field line pattern indicate about the charges of the object A and Object B?

• Both object A and Object B are negatively charged

• Object A is negatively charged and Object B is positively charged

• Object A is positively charged and Object B is negatively charged

• Both object A and object B are positively charged

• 10

• 20

• 30

• 40

An engineer builds a circuit having 3 identical resistors in series with a 15 V battery. What value will a voltmeter display, if she connects it across any 1 of the 3 resistors?

• 45 V

• 15 V

• 5.0 V

• 1.0 V

At which point is the magnetic field strength greatest?

• A

• B

• C

• D

• Bulb 1

• Bulb 2

• Bulb 3

• Cannot be determined

• 2.5 A; Clockwise

• 2.5 A; Counterclockwise

• 40 A; Clockwise

• 40 A; Counterclockwise

What is the equivalent or total resistance (R_e) across this circuit?

• 3 kΩ

• 10 kΩ

• 18 kΩ

• 16 kΩ

How does resistance affect current?

• less resistance - less current
• more resistance - less current
• more resistance - more current
• resistance does not affect current

Power  = ?

• Current
• Voltage
• Current X Voltage
• Current / Voltage

Comparing branches in a parallel circuit:

• the voltage is the same in all branches
• the voltage depends on the resistance
• the resistance depends on the voltage
• the resistance is the same in all branches