ECAT Pre Engineering Physics Chapter 16 online mcq test with answers for chapter 16 (Alternating Current)

Physics ECAT Pre Engineering Chapter 16 Alternating Current Online Test

Sr. #	Questions	Answers Choice
1	The highest value reached by the voltage or current:	In quarter cycle is called Instantaneous value In half cycle is called peak-to-peak value In one cycle is called peak value In half cycle is called Instantaneous value None of these
2	The entire wave form of sinusoidal voltage is actually a set of all the:	Positive maximum value + V<sub>o</sub>and negative maximum value -V<sub>o</sub> Posiotive maximum value +V<sub>o </sub>and zero Zero and negative maximum value -V<sub>o</sub> Any of these None of these
3	The waveform of alternating voltage is a:	Square Rectangular Saw-tooth Sinusoidal None of these
4	The wave form of alternating voltage is the graph between:	Voltage across X-axis and time across y-axis Current and time Voltage along y-axis and time along x-axis Voltage and current Either (B) or (D)
5	The most common source of alternating voltage is:	Motor Transformer AC genrator Both (A) and (C) Both (A) and (B)
6	The time interval during which the Voltage source changes its polarity once is known as:	Time period T Half the time period Quarter the time period Two third of the time period None of these
7	Nowadays, Most of the electric energy is produced by the A.C. generators using:	Hydal water Geothermal energy Solar energy Biomass Both (B) and (D)
8	Alternating current is produced by a voltage source which polarity:	Remains the same Reverse after period T Keeps on reversing with time Reverse after every time interval T/2 Both (C) and (D)
9	Alternating current can be transmitted:	To long distance At very high cost At very low cost Both (A) and (C) Both (A) and (B)
10	A P-N juction or semiconductor diode cannot be used as	A rectifier Detector Oscillator An amplifier
11	In describing functions of digital systems, a closed switch will be shown as	0 1 low any one of these
12	Mathematical manipulation of the two quantized states can be best carried if they are represented by	high - low yes - no on - off 0 - 1
13	A digital system deals with quantities or variables which have	only one state only two discrete states three discrete states four discrete states
14	Most OP-AMP operates with	<u>+</u> 6 V supply <u>+</u> 10 V supply <u>+</u> 12 V supply <u>+</u> 24 V supply
15	The R₁= infinity and R₂= 0, then the gain of non-inverting amplifier is	zero infinity one any one of these

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