Electrical principle questions

State two applications of time constant in RC circuits. (2 marks)June/July 2020

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

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 each of the following terms as applied to a.c generation: (i) instantaneous values; (ii) amplitude(4 marks)June/July 2020

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 ...

State three advantages of digital meters over analogue meters. (3 marks)June/July 2020

Describe the following types of DC motors: i. shunt motor ii. series motor

State faraday’s two laws of electrolysis

Explain the principle of Wheatstone bridge and derive the formula for balance condition

Name three types of capacitor