Questions bank of UNIT 1 & 2.xlsx

	A	B	C	D	E	F	G
1	QNo	Question	Option 1	Option 2	Option 3	Option 4	Correct Option
2	1	What is the primary function of a rectifier?	Amplify current	Convert AC to DC	Increase voltage	Reduce ripple	2
3	2	A full-wave rectifier has ripple frequency ___ the input AC frequency.	Equal to	Twice	Half	None of these	2
4	3	The PIV requirement for a diode in a half-wave rectifier is equal to ___	Vrms	Vm	2Vm	Vm / √2	2
5	4	Which diode is suitable for high-frequency rectification?	Zener diode	Schottky diode	Tunnel diode	LED	2
6	5	A bridge rectifier requires ___ diodes to operate.	1	2	3	4	4
7	6	The efficiency of a full-wave rectifier is approximately ___	50%	40.60%	81.20%	100%	3
8	7	A capacitor in a rectifier circuit reduces ___	Ripple voltage	Input voltage	Load resistance	None of these	1
9	8	Zener diodes are primarily used for ___	Voltage regulation	Signal rectification	Amplification	Ripple reduction	1
10	9	A diode with a higher reverse breakdown voltage is likely to be ___	A Zener diode	An LED	A Schottky diode	A Tunnel diode	1
11	10	In a half-wave rectifier, the output power is typically ___ of the input power.	40.60%	50%	81.20%	100%	1
12	11	The ripple factor of a bridge rectifier is:	Lower than full-wave	Higher than full-wave	Same as full-wave	None of these	1
13	12	Light Emitting Diodes (LEDs) emit light when they are ___	Reverse-biased	Forward-biased	Not biased	Neutral	2
14	13	A diode conducts when it is ___	Reverse-biased	Forward-biased	Open	Shorted	2
15	14	The voltage across a Zener diode in reverse bias remains constant when ___	Load varies	Input voltage varies	Both A and B	None of these	3
16	15	A capacitor filter in a rectifier improves ___	Efficiency	Voltage regulation	Output smoothness	None of these	3
17	16	For a full-wave rectifier, the number of diodes conducting at any time is ___	1	2	3	None of these	2
18	17	The Peak Inverse Voltage (PIV) for a bridge rectifier diode is ___	2Vm	Vm	Vm / √2	Vrms	2
19	18	A Zener diode operating in reverse bias ensures ___	Constant current	Constant voltage	Both	None	2
20	19	A voltage multiplier circuit generates ___	Higher DC voltage	Lower AC voltage	AC to DC conversion	None	1
21	20	A photo diode is sensitive to ___	Voltage	Light	Current	Temperature	2
22	21	The primary advantage of a Schottky diode is ___	Low forward voltage drop	High reverse breakdown voltage	High efficiency	High ripple rejection	1
23	22	The ripple frequency in a bridge rectifier is ___	Equal to the AC frequency	Twice the AC frequency	Half the AC frequency	None	2
24	23	The average output voltage of a full-wave rectifier is ___	Vm	2Vm / π	Vm / π	None	2
25	24	Which of the following diodes is used in voltage regulation?	Zener diode	Photo diode	Schottky diode	None	1
26	25	Which circuit uses a diode to control the voltage level?	Rectifier	Multiplier	Voltage regulator	Oscillator	3
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