AC and DC current

An oscilloscope shows the current flow above what type of current is it showing?

• DC

• AC

• Rectified Current

• Non rectified current

• DC

• AC

• rectified current

• non rectified current

A transform has 2400 turns on a primary coil and 120 turns on a secondary coil, the input voltage is 240 volts what is the output voltage?

Secondary voltage / Primary voltage = No. of turns in Secondary coil / No. of turns in Primary coil.

• 6v

• 9v

• 12v

• 24v

A transform has 14400 turns on a primary coil and 360 turns on a secondary coil, the output voltage is 6 volts what is the input voltage?

Secondary voltage / Primary voltage = No. of turns in Secondary coil / No. of turns in Primary coil.

• 90

• 120v

• 180v

• 240v

The above half wave form is created by an AC going into which circuit?

• single diode

• Bridge rectifier

• Transformer

• Voltage regulator

The above half wave form is created by an AC going into which circuit?

• single diode

• Bridge rectifier

• Transformer

• Voltage regulator

What electrical component is used to smooth half wave current signals?

• Resistor

• Diode

• Capacitor

• Voltage regulator

What form does an inductor store electricity?

• Watts

• Joules

• Voltage

• Current

Why is a voltage regulator used in a power supply circuit?

• It can maintain a smooth DC voltage when the circuit is under a load.

• It creates a voltage loss.

• Voltage regulator are often used with a heat sink that looks cool.

• Because it is better to regulate voltage.

What circuits where used to create the wave form pictured?

• Single diode and capacitor

• Transformer and voltage regulator

• Bridge rectifier and smoothing capacitors

• Diodes, transistors, resistor and inductors.