Physics FSC Part 2 Chapter 16 Online MCQ's Test With Answers

image
image
image

Physics FSC Part 2 Chapter 16 Online MCQ's Test

Sr. # Questions Answers Choice
1 Xc = 1/2πfc 2πfc 2π/fc fc/2π
2 The internal resistance of a capacitor is called: Impedance Resistance Reactance Conductance
3 In A.C circuit through a capacitor which one is: Current leads voltage by 90<sup>∘</sup> Current lags behind voltage by 90<sup>∘</sup> Both will be in phase None of above&nbsp;
4 In purely resistive A.C circuit, instantaneous value of voltage and current: Current lags behind voltage Current leads voltage by&nbsp;π/2 Both are in Phase Voltage leads current by Pase&nbsp;θ=π/2
5 Vrms = 0.7V<sub>∘</sub> <div>0.07V<sub>∘</sub></div> 0.007V<sub>∘</sub> 0.75V<sub>∘</sub>
6 The highest value reached by the voltage or current is one cycle is called: Peak to peak value Peak value <div>Instantaneous value</div> Root mean square value
7 The main reason for world wide use of A.C is because: It is very high power&nbsp; It can be transmitted over long distance It is cheaper to use ALl of above
8 The electromagnetic spectrum contains Radio waves X-rays Microwaves All of these
9 In frequency modulation, the amplitude of carrier waves is Increases Remains constant Decreases None of these
10 Radio frequency choke is Iron cored Air Cored Air as well as iron cored None of these
11 At high frequency, the current through a capacitor is Small Infinity Zero Large
12 The effective value of any sinusoidal alternating current or voltage is None of the above
13 The reactance of inductor depends upon L All of the above
14 The natural frequency of L.C circuit is equal to
15 The unit of impedance is Farad Henry Tesla Ohm
16 In case of capacitor, the unit of reactance is Farad Ohm Newton All of these
17 The reactance is the ratio of V<sub>rms</sub>/I<sub>rms</sub> V<sub>rms</sub> x I<sub>rms</sub> I<sub>rms</sub>/V<sub>rms</sub> V<sub>max</sub> x V<sub>rms</sub>
Download This Set
×