NEW
Font size
WorksheetsAC DC
Total questions: 11
Worksheet time: 6mins
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
The above half wave form is created by an AC going into which circuit?
single diode
Bridge rectifier
Transformer
Voltage regulator
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
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
The UK mains electrical supply is rated at...
120V
240V
230V
12V
Electricity is sent through the National Grid over ............... transmission lines.
low voltage
no voltage
high voltage
