16. Spectral plate of plumbicon consist of :
(a) Blue
(b) Green
(c) Cyan
(d) Red
17. Image lag in vidicon is :
(a) Severe
(b) Negligible
(c) Absent
(d) Equal to the plumbicon
18. The term potential well pertains to …………
(a) resistor
(b) inductor
(c) capacitor
(d) transformer
19. Spectral response of plumbicon is poor in …………
(a) blue
(b) green
(c) red
(d) cyan
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