Electronic Principles Suppose a step-down transformer has a turns ration of 5:1. If the secondary current is 1A rms, what is the primary-current? 0.3 A 0.6 A None of these 0.4 A 0.2 A 0.3 A 0.6 A None of these 0.4 A 0.2 A ANSWER DOWNLOAD EXAMIANS APP
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? 208 mA 7.8 mA None of these 300 mA 200 mA 208 mA 7.8 mA None of these 300 mA 200 mA ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What form of energy is used to maintain an imbalance of charges between the terminals of a battery? Solar energy Electronical energy None of these Mechanical energy Chemical energy Solar energy Electronical energy None of these Mechanical energy Chemical energy ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm? None of these 250 Ohm 60 Ohm 70.7Ohm 99.3 Ohm None of these 250 Ohm 60 Ohm 70.7Ohm 99.3 Ohm ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles If a load resistance is 1 kW, a stiff voltage source has a resistance of Less than 100 k Ohm More than 100 k Ohm less than 10 Ohm At least 10 Ohm None of these Less than 100 k Ohm More than 100 k Ohm less than 10 Ohm At least 10 Ohm None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Doubling the operating voltage of a purely capacitive circuit: None of these has no effect on the capacitive reactance cuts the capacitive reactance in half doubles the amount of capacitive reactance multiplies the capacitive reactance by 7 None of these has no effect on the capacitive reactance cuts the capacitive reactance in half doubles the amount of capacitive reactance multiplies the capacitive reactance by 7 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS