155. Power factor of an ordinary electric bulb is
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156. Power factor of an ac circuit is equal to
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157. While drawing phasor diagram for a series circuit, the reference phasor is
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158. Skin effect occurs when a conductor carries current at
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159. The generation voltage is usually
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160. The number of turns of a coil heving a time constant T are doubled. Then the new time constant will be
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161. A 24 V battery of internal resistance r = 4 ohm connected to a variable resistance R. The rate of heat dissipated in the resistor is41maximum when the current drawn from the battery is I. The current drawn from the battery will be 1 2 when R is equal to
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