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8251-BASIC ELECTRICAL AND ELECTRONICS ENGINEERING: Q&A

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State ohm’s law.(N/D-2016) The potential difference across any two ends of a conductor is directly proportional to the current flowing between the two ends provided the temperature of the conductor ... remains constant. 2. Compare moving coil and moving iron instruments. List the operating forces present in indicating instruments.(M/J-2016) In an indicating instrument, it is essential that the moving system is acted upon by three distinct torque (or forces) for satisfactory working. There torques are: 1. A deflecting or operating torque, Td 2. A controlling torque, Tc 3. A damping torque, Tv. 4. State ohm’s law and its limitations.(N/D-2015) Ohm’s law: The potential difference across any two ends of a conductor is directly proportional to the current flowing between the two ends provided the temperature of the conductor remains constant. Limitation of Ohm's Law: The limitations of Ohm's law are explained as follows: This law cannot be applied to unilateral networks. A unilateral network has unilateral elements like diode, transistors, etc., which do not have same voltage current relation for both directions of current. 5. Mention the errors in moving coil instruments.(N/D-2015) The errors that usually occur in PMMC instruments are 1. The frictional error. 2. Temperature error [Show More]

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