Electronic Principles Which one of the following phrasers best describes flux density? The rate of change of the number of lines of magnetic force None of these The force that maintains lines of force The concentration of lines of magnetic force The opposition to a build-up of magnetic fields The rate of change of the number of lines of magnetic force None of these The force that maintains lines of force The concentration of lines of magnetic force The opposition to a build-up of magnetic fields ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio? 180 0.25 0.5 4 None of these 180 0.25 0.5 4 None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles If the current gain is 200 and the collector current is 100 mA, the base current is 0.5 mA 200 A 0.083333333333333 2 mA None of these 0.5 mA 200 A 0.083333333333333 2 mA None of these ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles Molecule is The smallest particle of a substance that retains the properties of that substance A atom that has an excessive number of electrons in its outer orbit A atom that has a shortage of electrons in its outer orbit None of these A atom that flows whenever there is an imbalance of electrical charges between two points The smallest particle of a substance that retains the properties of that substance A atom that has an excessive number of electrons in its outer orbit A atom that has a shortage of electrons in its outer orbit None of these A atom that flows whenever there is an imbalance of electrical charges between two points ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles What form of energy is used to maintain an imbalance of charges between the terminals of a battery? Chemical energy Solar energy Mechanical energy None of these Electronical energy Chemical energy Solar energy Mechanical energy None of these Electronical energy ANSWER DOWNLOAD EXAMIANS APP
Electronic Principles As the temperature increases, the current gain can be any of the above increases None of these decreases contant can be any of the above increases None of these decreases contant ANSWER DOWNLOAD EXAMIANS APP
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