29. One of the following satisfies the condition of Ohm’s law.a. Application to metals which heated up due to flow of current over themb. application to AC circuit having its impedance used in place of resistancec. application to semiconductord. application to vacuum radio valves30. Concerning human safety, which situation is most dangerous?
31. An inverter is a device that provides what type of conversion?32. A 60 Hz frequently would cause an electric light toper second33. With the same voltage applied which of the following allows more current?a. 25b. 250c. 2.5d. 0.2534. The greatest value attained during one half cycles is called as35. A/An _____ can be used to measure the frequency content of a waveform and is a frequency domain instrument.36. How many nodes are needed to completely analyzer a circuit according to Kirchhoff’s current law?circuit37. _____ can be produced in AC circuits only when both current and voltage are either positive or negative.a. Wattsb. true powerc. RMSd. A or B38. What is the average value of all the instantaneous voltages occurring during one cycle of an ac waveform with a peak value of 60 volts?39. The pulses of pulsating direct current are often referred to as40. The ____ value must be found when a sine wave AC voltage is changed into directcurrent.41. The value of alternating current that will heat a resistor to the same temperature as an equal value of direct current is known asa. average currentb. effective currentc. maximum currentd. input current42. ____ is the term used to express the amount of electrical energy in an electrostatic field