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Monopolar needle electrodes are having coatings of which material over the stainless steel wires which are bare only at the tips?(a) carbon(b) calcium(c) sodium(d) teflon |
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Answer» The correct answer is (d) teflon The best explanation: The monopolar needle electrode consists of a teflon coated stainless steel wire. The wire is bare only at the tip. It is found that after the needle has been used a number of times, the teflon coating will recede, increasing the tip area. The needle should be discarded when this happens. |
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