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Question-1. What is a Potentiometer?
Answer-1: A potentiometer is a continuously variable rotating or sliding resistance.
Question-2. What is the use of potentiometer?
Answer-2: Often a potentiometer is used as a linear resistance or linear voltage divider. They are commonly used to control electrical devices such as volume controls on audio equipment.
Question-3. What is Circuit breaker
Answer-3: A two-terminal device designed to ensure that current levels do not exceed safe levels. If "tripped," it can be reset with a switch or a reset button
Question-4. Define Efficiency?
Answer-4: A ratio of output to input power that provides immediate information about the energy-converting characteristics of a system.
Question-5. How Crompton DC potentiometer differs from sliding contact wire potentiometer?
Answer-5: It consists rounded wire instead of straight wire.
Question-6. How linear potentiometer works?
Answer-6: Resistor arranged with a fixed connection on each end and a sliding connection between the two ends, so that translation of the sliding connection alters the resistance between it and each end.
Question-7. What do you mean by Calibration?
Answer-7: The process of adjusting an instrument or compiling a deviation chart so that its reading can be correlated to the actual value being measured.
Question-8. What is the principle of Potentiometer?
Answer-8: The potential difference across any length of a wire of uniform cross-section and uniform composition is proportional to its length when a constant current flows through it.?
Question-9. Define Sensitivity of a Potentiometer?
Answer-9: The sensitivity of the potentiometer depends upon the value of potential gradient K. (K=Potential supplied by main battery divided by length of wire) Smaller the value of K, smaller the potential difference that a potentiometer can measure and more is the sensitivity of the potentiometer.
Question-10. State Ohms Law?
Answer-10: Ohms law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance
Question-11. Define Power?
Answer-11: An indication of how much work can be done in a specified amount of time; a rate of doing work. It is measured in joules/second (J/s) or watts (W).
Question-12. Define Resistance?
Answer-12: The electric property that impedes current; for ohmic materials, it is the ratio of voltage to current, R = V/I
Question-13. What is a Rheostat?
Answer-13: An element whose terminal resistance can be varied in a linear or nonlinear manner.
Question-14. What do you mean by Variable Resistor
Answer-14: A resistor whose resistance can be varied.
Question-15. What do you mean by Voltage Drop
Answer-15: The amount of energy consumed when a device offers resistance in its circuit.
Question-16. What is Varistor?
Answer-16: A voltage-dependent, nonlinear resistor used to suppress high-voltage transients.
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