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86. Which of the following is true ?
i. Oscilloscope is basically a voltmeter
ii. CRO is a fast x-y plotter
iii. Effect of negative voltage to the grid is an attractive force
iv. Focusing and accelerating anodes are cylindrical
v. During flyback period, voltage is very high
A) All are true
B) Only i, ii and iv are true
C) Only i and ii are true
D) Only i and iv are true
87. The inductance of a moving iron instrument is given by :
L....
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