134. The minimum gradient in a cable occurs in
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135. A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 103 N, is known as
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136. Dielectric strength of a medium is usually expressed in
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137. Which of the following medium will have highest value of relative permittivity?
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138. A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be
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139. Which is the most superior dielectric out of the following?
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140. To prevent the generation of static charges on rubber or flat leather
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