Increase in the voltage acting upon a solid conductor increases the current through it, but in the case of the electric arc an increase in current is accompanied by a fall in the difference of potential of the carbons, within certain limits, and the arc has therefore been said to possess a negative resistance.' [Please select]
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The plated ends of the carbons should be covered with paraffin for about 1 in. [Please select]
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It is not sharp, but surrounded by a halo which nearly obliterates the carbons. [Please select]
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48), silvered in front and placed behind the carbons (P). [Please select]
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No arc would be formed unless the carbons were first touched to start incandescence. [Please select]
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"This, and two carbons, I shall endeavour to send by pigeon." [Please select]
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A term employed to designate the gap, or the current which flows across between the conductors, like the space between the two carbons of an arc lamp, which gives the light. [Please select]
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Others before him had attacked the problem of electric lighting, but lack of suitable carbons stood in the way of their success. [Please select]
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