Electronic Principles A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current? 300 mA 7.8 mA 200 mA 208 mA None of these 300 mA 7.8 mA 200 mA 208 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding? 20 A 50 A 0.20833333333333 None of these 20 A 50 A 0.20833333333333 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The dielectric constant of a material is a measure of: the amount of voltage it can withstand before breaking down the amount of opposition to the current flow None of these how well the material concentrates electrostatic lines of force how well the material concentrates magnetic lines of force the amount of voltage it can withstand before breaking down the amount of opposition to the current flow None of these how well the material concentrates electrostatic lines of force how well the material concentrates magnetic lines of force ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What form of energy is used for creating static electricity? Chemical energy None of these Mechanical energy Solar energy Light energy Chemical energy None of these Mechanical energy Solar energy Light energy ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The period of a waveform is: the number of cycles completed in one second the time required to complete one full cycle None of these equal to 0.707 times the peak amplitude the time required for the voltage to rise from 10% to 90% of the peak amplitude the number of cycles completed in one second the time required to complete one full cycle None of these equal to 0.707 times the peak amplitude the time required for the voltage to rise from 10% to 90% of the peak amplitude ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the inductive reactance of a 0.1-H coil that is operating at 1000 Hz? 444 Ohm None of these 100 Ohm Less than 1 Ohm 628 Ohm 444 Ohm None of these 100 Ohm Less than 1 Ohm 628 Ohm ANSWER DOWNLOAD EXAMIANS APP
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