Duduli

As the electron beam leaves the accelerating anode, it comes under the influence of vertical horizontal deflection plates. If no voltage is applied to the deflection plates, the electron beam will appear at O. Where the positive plate electrons are deflected towards that plate.

The modern cathode ray oscilloscope provides a powerful tool for solving problems in electrical measurements. some important applications of CRO are,   1. Examination of waveforms   2. Voltage measurement   3. Frequency measurement   4. Current measurement   5. Measurement of phase difference 

The cathode ray oscilloscope (CRO) is an electronic device which is capable of giving a visual indication of a signal waveform (electrical signals). ★ A CRO can be used to measure the amplitude & frequency of signal voltage. It can also be used to measure phase difference between two ac voltages.

The shift of the spot of light on the screen per unit change in voltage across the deflection plates is known as deflection sensitivity of CRT. Spot deflection = Deflection sensitivity × applied voltage.