Topic 34

Question 1

Describe the structure of the Cathode-ray oscilloscope

Answer 1

Electrong gun with an accelerating anode

Horizontal and vertical deflection plates

Flourescent screen that electrons hit, producing light

Question 2

Describe the operation of the Cathode-ray oscilloscope

Answer 2

With no electric field, there is only a bright spot on the screen

With electric field, the spot moves, creating a pattern

Pattern based on potential differences.

Question 3

What is the use of the cathode-ray oscilloscope

Answer 3

To study ECG and EEG

Question 4

Describe High Frequency electricity diathermy

Give the methods

Answer 4

Electric power transformed into heat in the body at frequencies higer than 100 kHz.

Capacitance method

Inductance Method

Question 5

Describe capacitance diathermy

Answer 5

Tissue placed between 2 capacitos with oscillating electric field.

Ions in the tissue move

Question 6

Describe Inductance Diathermy

Answer 6

Tissue is place within or near the inductor producing alternating magnetic fields.

Question 7

Describe Microwave Diathermy

Answer 7

Tissue absorbs electromagnetic waves that are on it.

Question 8

Describe high frequency electric surgery

Answer 8

Using a probe to rapidly boil cell fluids

Explodes the cells