17. What bias conditions must be present for the normal operation of a transisto

Question

17. What bias conditions must be present for the normal operation of a transistor amplifier? A. The emitter-base junction must be reverse biased, and the collector-base junction must be forward biased. B. Both junctions must be reverse biased. C. Both junctions must be forward biased. D. The emitter-base junction must be forward biased, and the collector-base junction must be reverse biased. 18. An electric heating element is connected to a 110 V circuit and a current of 3.2 A is flowing through the element. How much energy is used up during a period of 5 hours by the element? A. 352 Wh B. 550 Wh C. 1,760 Wh D. 2,580 Wh 19. The available source of charge that pushes a charge through a circuit is A. resistance. B. voltage. C. direct current. D. alternating current. 20. An example of an atom that has no charge is one that has A. 3 protons, 1 electron, and 3 neutrons. B. 2 protons, 2 electrons, and 1 neutron. C. 3 protons, 2 electrons, and 1 neutron. D. 1 proton, 2 electrons, and 3 neutrons. 21. The part of the atom that accounts for electricity is the A. nucleus. B. proton. C. electron. D. neutron.

Explanation / Answer

17. A. The emitter-base junction must be reverse biased, and the collector-base junction must be forward biased
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18. use POwer = Eenrgy/time = Vi

Enegry E = Vit

E = 110 * 3.2 * 5

E = 1760 Watt hours , option C

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19. its the applied Potential differecne which pushes the charge to move frm palce to place here by creating current

so the option is B, Volatge

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20.. for Net Charge to be zero,

it must have equal no. of +ve and -v charge irrespective on neutrons

so here from the given options

it must be option B: B. 2 protons, 2 electrons, and 1 neutron.

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21.

its the option of charge which constitutes electricity

in fact -ve charge but direction by convention +ve is followed

so

so here the option is B

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