AC Fundamentals, Circuit and Circuit Theory Wire-wound resistors are unsuitable for use at high frequencies because they Exhibit unwanted inductive and capacitive effects Are likely to melt under excessive eddy current heat Consume more power Create more electrical noise Exhibit unwanted inductive and capacitive effects Are likely to melt under excessive eddy current heat Consume more power Create more electrical noise ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory Inductance of coil Decreases with the increase in supply frequency Increases with the increase in supply frequency Becomes zero with the increase in supply frequency Is unaffected by the supply frequency Decreases with the increase in supply frequency Increases with the increase in supply frequency Becomes zero with the increase in supply frequency Is unaffected by the supply frequency ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In a pure inductive circuit The current leads the voltage by 90° The current lags behind the voltage by 90° The current can lead or lag by 90° The current is in phase with the voltage The current leads the voltage by 90° The current lags behind the voltage by 90° The current can lead or lag by 90° The current is in phase with the voltage ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of Iron loss in core Increase in temperature Capacitive effect between adjacent coil turns Skin effect Iron loss in core Increase in temperature Capacitive effect between adjacent coil turns Skin effect ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory In any A.C. circuit always Apparent power is more than actual power Actual power is more than reactive power Reactive power is more than actual power Reactive power is more than apparent power Apparent power is more than actual power Actual power is more than reactive power Reactive power is more than actual power Reactive power is more than apparent power ANSWER DOWNLOAD EXAMIANS APP
AC Fundamentals, Circuit and Circuit Theory The r.m.s. value and mean value is the same in the case of Sine wave Square wave Triangular wave Half wave rectified sine wave Sine wave Square wave Triangular wave Half wave rectified sine wave ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS