Module 1 - Alternating Current

What does AC stand for? 

• Direct Current 
• Alternating Current 

The type of current where charges flow in one direction

• Direct Current

• Alternating Current

The type of current where charges shake back and forth in a circuit

• Alternating Current

• Direct Current

• shaking current

• Switchback Current

The device that lowers our AC voltage so we can use it in our homes

• Transformer

• motor

• diode

• generator

A battery makes ...

• Alternating current

• Direct current

a phone charger needs to ...

• step down the voltage and turn it to D.C

• step up the voltage and turn it to D.C

• step down the voltage and turn it to A.C

• step up the voltage and turn it to A.C

Select the advantages of ac over dc

• AC can be stepped up and down by using a transformer

• AC can be transmitted over long distance with minimum losses

• AC can be converted to DC

• 100Vp AC can provide same power as 100V DC

Which one of the below is NOT an AC device?

• Washing machine

• Fridge

• Drill machine

• Microwave

Which one below is the definition of frequency?

• One complete positive and one complete negative part of the wave

• Time taken to complete one cycle

• Number of cycles in one second

• Maximum value of the AC wave

Which one of the below AC parameters show the effective Dc value?

• Peak Value

• RMS value

• Peak to peak value

• Frequency