Q.71 Dynamic resistance of the diode is the ratio of ________________ to _________________.Ans 1. current; voltage2. change in voltage; change in current3. voltage; current4. change in current; change in voltageCorrect Ans: 2

Q.60 A capacitor is allowed to accumulate the charge through a 3.5A current. How much time will it require to accumulate a charge of 70µC charge?Ans 1. 20µ sec2. 2µ sec3. 20 sec4. 200µ secCorrect Ans: 1

Q.66 Two components of stray load loss of a synchronous motor are:Ans 1. iron loss due to armature leakage flux and armature ohmic loss due to skin effect2. windage loss due to load and frictional loss3. field circuit ...

Q.78 Which of the following statements with respect to reluctance are true?(i) Reluctance is directly proportional to the length of magnetic circuit.(ii) Reluctance is directly proportional to the area of cross-section.(iii) Reluctance is inversely proportional ...

Q.62 The strength of electromagnetic radiation is measured by photometer in the range from ________.Ans 1. ultraviolet to infrared2. ultraviolet to visible light3. infrared to ultraviolet4. visible light to ultravioletCorrect Ans: 1

Q.71 Dynamic resistance of the diode is the ratio of ________________ to _________________.Ans 1. current; voltage2. change in voltage; change in current3. voltage; current4. change in current; change in voltageCorrect Ans: 2

Q.88 If input frequency is 100Hz for a half-wave rectifier, the ripple frequency of it would be ____________.Ans 1. 150 Hz2. 100 Hz3. 200 Hz4. 50 HzCorrect Ans: 2

Q.91Ans 1. 12A2. 4A3. 10A4. 2ACorrect Ans: 2

Q.83 Consider the following statements about auxiliary motor starting method of synchronous motor and select the suitable combination of correct choices.a.A three-phase induction motor is used as an auxiliary motor.b.An induction motor with two poles, fewer ...

Q.64 The magnetism of a magnetic material is retained even after removal of magnet. This shows that the magnetic material has which of the following properties?Ans 1. Reluctance2. Retentivity3. Resistivity4. Relative permeabilityCorrect Ans: 2