Objective Questions Short notes Objective questions (Answers are given below) The minimum number of wattmeter (s) requiredto measure 3-phase, 3-wire balanced orunbalanced power is(a) 1(b) 2(c) 3(d) 4(GATE 2001) A wattmeter reads 400 W when its current coilis connected in the R phase and its pressurecoil is connected between this phase and theneutral of a … Read more
Objective Questions Short notes Objective questions (Answers are given below) The decibel is a measure of(a) power (b) voltage(c) current (d) power level When the output voltage level of a filterdecreases by – 3 dB, its absolute valuechanges by a factor of(a) 2 (b) 1/ 2(c) 2 (d) 1/2 The frequency corresponding to half-powerpoint on … Read more
Objective Questions Short notes Objective questions (Answers are given below) Maxwell-Wien bridge is used for measuring(a) capacitance (b) dielectric loss(c) inductance (d) phase angle Maxwell’s L/C bridge is so called because(a) it employs L and C in two arms(b) ratio L/C remains constant(c) for balance, it uses two oppositeimpedances in opposite arms(d) balance is obtained … Read more
Objective Questions Short notes Objective questions (Answers are given below) Fill in the blanks(a) unit of admittance is ………..(b) unit of capacitive susceptance is ………..(c) admittance equals the reciprocal of ………..(d) admittance is given by the ……….. sum ofconductance and susceptance. An R-L circuit has Z = (6 + j8) ohm. Itssusceptance is -Siemens.(a) 0.06 … Read more
Objective Questions Short notes Objective questions (Answers are given below) In a series R-L circuit, VL—VR by—degrees.(a) lags, 45 (b) lags, 90(c) leads, 90 (d) leads, 45 The voltage applied across an R-L circuit isequal to—of VR and VL.(a) arithmetic sum (b) algebraic sum(c) phasor sum (d) sum of the squares. The power in an … Read more