UPS

CRT

Rectifier

Amplifier

Zero

Around 100 ohms

Around 1000 ohms

Around one mega ohms

By adjusting the voltage

By reducing the current

Through shift controls

By means of galvanometer

Using RMS value

Using absolute value

Using peak to peak value

Using a voltmeter

Cathode Ray Tube

Cathode Ray Oscilloscope

Cathode Ray Oscillator

Cathode Ray Organiser