The instrument used to check insulation of household wiring is
1). megger
2). ohmmeter
3). multimeter
4). high resistance voltmeter
1. Which of the following heating methods has maximum power factor?
3. At room temperature the number of conducting electrons in an intrinsic semiconductor
4. The rate of acceleration on suburban or urban service is in the range
5. All coil cores are made of iron.
7. A control system working under unknown random actions is called
8. The crystal oscillator frequency is very stable due to ___________ of the crystal
9. A balanced 3-phase system consists of
10. How many free electrons does a p type semiconductor has?