In Fig. 10, identify and state the functions of the parts labelled (i)         B; (ii)        D; (iii)       F;

(iv)       G.

State the type of deflection used in a cathode ray tube;,'

B is the control grid, and its function is to control the brilliance,of the scope's display:

1. D is the instrument's focus control, and it serves to control the focus of the oscilloscope's display.

2. F is referred to as the 'Y deflection plates," and the two plates control the vertical motion of the beam. .

3. G is the 'X deflection plates', and the two plates control the horizontal motion for the beam.

(b) Deflections in the cathode'ray tube are of the electronic variety.