AC Webxam Review 1

What formula is pictured?

• Inductive Reactance

• Capacitive Reactance

• Z in Series

• Z in parallel

Which of the following is true about Ground Fault Circuit Interrupters (GFCIs)?

• They don't need to be tested regularly

• GFCIs test for electrocution

• There is only one type of GFCI

• Each type of GFCI needs to be tested per the guidelines of the type

A Ground Fault Circuit Interrupter (GFCI) is designed to do which of the following?

• Detect Ground Faults

• Detect any amount of electricity

• Shut down the power to the entire grid upon detection of a fault

A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?

• 600 J 
• 660 J
• 900 J 
• 1200 J 

You do 90 joules of work in 30 seconds. How much power have you generated?

• 30 watts
• 3 watts
• 120 watts
• 270 watts

The current in the wires of a circuit is 90.0 milliAmps. If the light bulb was replaced by one with double the original resistance and the battery is replaced by one with triple the original voltage, then its new current would be _____ milliAmps.

• 15 milliAmps

• 60 milliAmps

• 135 milliAmps

• 540 milliamps

A1 measures 50 milliamps.  A3 measures 20 milliamps.  What would A2 measure?

• 70 ma 
• 24 ma 
• 30 ma
• 50 ma

Which of the following is symbol of capacitor ?

• 
• 
• 
• 

Capacitance is measured in___________

• Coulombs

• Farads

• Hz

• Volts

The picture and symbol of capacitor to the right represents:

• non-polarized

• polarized

• variable

• preset