Electronic Principles Current and voltage are said to be in phase when: their waveforms cross through zero and reach positive and negative peaks at the same time they have the same amplitude and frequency None of these All of these their waveforms are both ac or both dc their waveforms cross through zero and reach positive and negative peaks at the same time they have the same amplitude and frequency None of these All of these their waveforms are both ac or both dc ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The peak value of a sine waveform is: the amplitude at 70.7% of the maximum value the maximum positive or negative value the amplitude at 90% of the maximum value the amplitude at 1.41 times the maximum value None of these the amplitude at 70.7% of the maximum value the maximum positive or negative value the amplitude at 90% of the maximum value the amplitude at 1.41 times the maximum value None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles In a step-down transformer, which is larger? None of these Secondary voltage Impossible to say Neither Primary voltage None of these Secondary voltage Impossible to say Neither Primary voltage ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A zener diode has a voltage of 10 V and a current of 20 mA. What is the power dissipation? 200 mW None of these 300 mW 20 mW 10 mW 200 mW None of these 300 mW 20 mW 10 mW ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The rotating coil of wire in an electric motor is called the: None of these loop brush armature commutator None of these loop brush armature commutator ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit? There is no valid comparison Permeability Permeance Reluctance Retentivity There is no valid comparison Permeability Permeance Reluctance Retentivity ANSWER DOWNLOAD EXAMIANS APP
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