#### AC Fundamentals Objectives Part 05

**81 **Power factor of an inductive circuit can be improved by connecting a capacitor to it in**parallel.**

**82** For the same load, if the power factor of load is reduced, it will **draw more current.**

**83 ** For the saw tooth current waveform, the rms value is **5.77A.**

**84 ** The effects due to electric current are I. Magnetic effect, II. Heating effect, III.

Luminous effect. Appliance working on which effect can be used on ac as well as dc

supply?** II. and III. Only.**

**85 **The rms value of the waveform shown in Fig.14 will be **57.7.**

**86 ** The effects due to electric current are I. Thermal effect, II. Luminous effect, III.

Chemical effect, IIII. Magnetic effect. Which two effects are significant when current

flows through transmission lines** I and IV only.**

**87** A current in ac circuit measures 4 A. Then , the maximum instantaneous magnitude of

this current will be **๐ ร โ๐ A.**

**88** The equation of an a.c voltage is ๐ = 200 sin 50๐๐ก. Then, the r.m.s value of voltage is**๐๐๐โ๐ V. ??**

**89 ** When a.c. current flows through a resistance, then **cur**r**ent and e.m.f. are in phase.**

**90 ** The power factor of incandescent bulb is** unity.**

**91 **A incandescent bulb can work on** both ac as well as dc.**

**92** It is know that a given capacitor will fail if the terminal voltage exceeds 180 V. If the

circuit is operating on sinusoidal steady voltage, the maximum rms voltage that may

applied to the capacitor will be** 127 V.**

**93 ** For an alternating voltage form factor is**๐๐๐ ๐๐๐ฅ๐ฎ๐๐๐๐๐ง ๐ฏ๐๐ฅ๐ฎ๐**

.

**94 ** In and a.c. circuit, the current **any of the above, depending upon the elements (L,Cor R) of the circuit.**

**95 ** Power factor of the magnetizing component of a transformer is **zero.**

**96 ** Which of the following statement is not necessarily valid for ac currents: Alternating

currents **is suitable of charging batteries.Questions 97 and 98 refer to the data given below:**

A current is given by ๐ = 45.24 sin 377๐ก.

**97 ** The maximum value of the current is **45.24 A.**

**98** The frequency is๐๐๐๐๐
Hz.

**99** A circuit has impedance of (3 + ๐4). If a voltage (100 + ๐50) is applied, the power in

the circuit will be** 500 W.**

**100** Which will draw least current **40W lamp.****Questions 101 and 102 refer to the given data below:**