In a cathode ray oscillograph, the focusing of beam on the screen is achieved byA. convex lensesB. magnetic fieldC. electric potentialD. all of these

In a cathode ray oscillograph, the focusing of beam on the screen is a

1.	In a cathode ray oscillograph, the focusing of beam on the screen is achieved byA. convex lensesB. magnetic fieldC. electric potentialD. all of these
Answer» Correct Answer - C In a cathode ray oscillograph, the focusing of beam on the screen is achieved by electric potential. There are two plates X and Y. X plates consists two plates `X_(1) and X_(2)` in vertical plane while Y plates also consist two plates `Y_(1) and Y_(2)` in a horizontal plane. An electric potential is applied between the X and Y plates by an external source.

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In a cathode ray oscillograph, the focusing of beam on the screen is achieved byA. convex lensesB. magnetic fieldC. electric potentialD. all of these

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