1. Five lamps are connected in series. Each lamp requires 16V and 0.1 A. Find the total voltage. 2. A material that offers low resistance to a current flow in one direction and a high resistance in the reverse direction. 3. If I inject a current gain of 4A in a transistor and a base voltage of 3.7V, what type of material allows freely the passage of electricity through itself? Semiconductor, Resistor, Insulator or Conductor 4. If I inject a current gain of 4A in a transistor and a base voltage of 3.7V, what type of material allows freely the passage of electricity through itself? 5. Two lamps x and y are connected in series. Lamp x is rated 50 watts at 100V, while lamp y is rated at 100 Watts at 100V also. Tue two lamps are to be connected in series across a 200V source. What resistance must be connected at lamp A so that each lamp will operate properly? 6. Which is not a source of DC EMF? Thermocouple, Inverter, Piezoelectric cell, or batteries 7. What is the maximum voltage that can be safely applied across a 1/4-Watt, 91-ohm resistor?

1. Five lamps are connected in series. Each lamp requires 16V and 0.1 A. Find the total voltage. 2. A material that offers low resistance to a current flow in one direction and a high resistance in the reverse direction. 3. If I inject a current gain of 4A in a transistor and a base voltage of 3.7V, what type of material allows freely the passage of electricity through itself? Semiconductor, Resistor, Insulator or Conductor 4. If I inject a current gain of 4A in a transistor and a base voltage of 3.7V, what type of material allows freely the passage of electricity through itself? 5. Two lamps x and y are connected in series. Lamp x is rated 50 watts at 100V, while lamp y is rated at 100 Watts at 100V also. Tue two lamps are to be connected in series across a 200V source. What resistance must be connected at lamp A so that each lamp will operate properly? 6. Which is not a source of DC EMF? Thermocouple, Inverter, Piezoelectric cell, or batteries 7. What is the maximum voltage that can be safely applied across a 1/4-Watt, 91-ohm resistor?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

Section: Chapter Questions

Problem 6RQ: What is CEMF?

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What is CEMF?
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