AC DC

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

• DC

• AC

• Rectified Current

• Non rectified current

Tags

NGSS.HS-PS4-1

• DC

• AC

• rectified current

• non rectified current

Tags

NGSS.HS-PS2-5

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

• single diode

• Bridge rectifier

• Transformer

• Voltage regulator

Current that reverses direction in a regular pattern is called ____. 

• direct current 
• circuit current
• magnetic current
• alternating current 

Current that does NOT reverse direction is called ____. 

• magnetic current
• direct current
• circuit current
• alternating current

Diagram shows a trace on the screen of a C.R.O. when a signal is connected across the Y-input. What type of signal is applied across the Y-input and what is the condition of the time-base?

• alternating current, switched off

• direct current, switched off

• alternating current, switched on

• direct current, switched on

Diagram shows the trace displayed on the screen of a C.R.O. with the time-base set to 10 ms/div. What is the frequency, f of the wave?

• 5 Hz

• 25 Hz

• 40 Hz

• 50 Hz

Diagram shows a waveform displayed on the screen of a C.R.O. If the controls on the C.R.O. are set at 0.5 V/div and 2 ms/div, find the peak voltage and the frequency of the input signal.

• 4 V, 2 Hz

• 5 V, 10 Hz

• 2 V, 100 Hz

• 4 V, 100 Hz

Tags

NGSS.HS-PS4-1

Which of the following is wrong about the uses of C.R.O.?

• To measure potential difference

• To measure short time intervals

• To display waveforms

• To measure current

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

The UK mains electrical supply is rated at...

• 120V

• 240V

• 230V

• 12V