1. The difference between Ohmic and non-Ohmic conductors is a. Ohmic conductors have constant resistance when the voltage is varied across them and non-Ohmic conductors have changing resistance. b. their resistance but their temperature stays the same. C. none. d. Not enough information given. 2. LED obey Ohms law and so are called a. do; Ohmic conductors b. do; non-Ohmic conductors c. do not; Ohmic conductors d. do not; non-Ohmic conductors3. Which of these describes a current-voltage graph for an Ohmic conductor? a. Straight line passes through origin b. Curved line passes through origin C. A gradient that changes d. None of these 4. Which of these devices are Ohmic? a. metals, resistors, nichrome wires b. diodes, semiconductors, electrolytes, thyristors, transistors c. diodes, metals, resistor, electrolytes, thyristors d. metals, resistor thyristors 5. Which of these devices are non-Ohmic? a. metals, resistors, nichrome wires b. diodes, semiconductors, electrolytes, thyristors, transistors c. diodes, metals, resistor, electrolytes, thyristors d. metals, resistor thyristors 6. How must a voltmeter be connected? a. In-series c. to the power supply b. In-parallel d. none of these 7. Define potential difference. a. The amount of energy per charge. b. The amount of charge per energy. c. The amount of charge per second. d. The amount of voltage per second. 8. It is the energy per charge(voltage) supplied by a source e.g. battery a. emf c. voltage b. potential difference d. current 9. It is a pictogram used to represent (such as wires, batteries, resistors and transistors) in a drawing of an electrical or electronic circuit. a. Schematic diagram c. Pictogram b. Electrical symbol d. none of these 10. A safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level, used to prevent electrical fires. a. battery c. Ground b. Fuse d. relay11. It is the picture that represents the components of a process, device, or other object using the different symbols or lines. a. Schematic diagram c. Pictogram b. Electrical symbol d. none of these 12. What electrical symbol is this? a. Resistor b. Battery c. Voltmeter d. Ammeter 13. What electrical symbol is this? a. Voltmeter b. Battery c. Lamp d. Ammeter 14. What electrical symbol is this? a. Resistor b. Switch c. variable resistor d. ammeter 15. Which of the following statements is NOT TRUE about EMF? a. The electromotive force is the amount of energy given to each coulomb of charge. b. The electromotive force is independent of the circuit's internal resistance. c. The electromotive force is responsible for transferring energy across the circuit. d. The electromotive is propo o the c