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A moving coil instrument has a coil resistance of 12Q anda maximum permissible instrument current of 18 mA. The instrument is converted to a voltmeter with a full scale deflection of 250 V. (i) Determine the value of the resistor to ...
Differentiate between the following with the following with reference with electrical material i. semiconductor; ii. insulator
Define each of the following terms as applied to a.c generation: (i) instantaneous values; (ii) amplitude(4 marks)June/July 2020
State Kirchhoff’s i. voltage law ii. current law
Define the term reluctance as used in magnetism
A current of 2.45 A flows through a 39 microFarads capacitor connected across a 50 Hz supply. Detérmine the supply voltage. (3 marks)June/July 2020
Define the following terms as used in electrostatics i. electric field intensity ii. relative permittivity
Explain the three losses that occur in a transformer and state how they are minimized
A series circuit consisting of a Capacitor and a resistor is connected across a d.c supply. Draw and label the following circuit transient curves: (i) capacitor voltage transient; – (i) resistor voltage transient; (iti) current transient. (6 marks)June/July 2020
