Identification of Diode, LED, Resistor, A Capacitor from a Mixed Collection of such items NEET Questions

Physics - Experimental Skills

Identification of Diode, LED, Resistor, A Capacitor from a Mixed Collection of such items MCQ Questions


7.
Which of the following is the FUNDAMENTAL difference between a diode and an LED?
A.
LED is cheaper
B.
LED is bigger
C.
LED emits visible light during forward conduction; ordinary diode does not (or emits IR/no visible)
D.
No difference
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ANSWER :
C. LED emits visible light during forward conduction; ordinary diode does not (or emits IR/no visible)
8.
In a mixed bag of components, the simplest way to start identification is by:
A.
Just connecting to a battery
B.
Weight only
C.
Visual inspection (size, shape, color, markings)
D.
Random testing
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ANSWER :
C. Visual inspection (size, shape, color, markings)
9.
A typical resistor (carbon composition or carbon film) has:
A.
Cylindrical shape with color bands (3-6 bands) and two leads
B.
Glass enclosure
C.
A stripe/band on one end
D.
Three terminals
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ANSWER :
A. Cylindrical shape with color bands (3-6 bands) and two leads
10.
A typical ceramic disc capacitor has:
A.
A stripe/band
B.
Three terminals
C.
Disc shape with two leads, marked with capacitance value (e.g., 104 = 0.1 μF)
D.
Color bands like resistor
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ANSWER :
C. Disc shape with two leads, marked with capacitance value (e.g., 104 = 0.1 μF)
11.
A typical electrolytic capacitor has:
A.
Glass body
B.
Color bands
C.
Disc shape
D.
Cylindrical shape with marked polarity (+ or - terminal); aluminium can; capacitance and voltage rating visible
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ANSWER :
D. Cylindrical shape with marked polarity (+ or - terminal); aluminium can; capacitance and voltage rating visible
12.
A typical p-n junction diode has:
A.
Three leads
B.
Disc shape
C.
Color bands at both ends
D.
Cylindrical body with a colored band (stripe) marking the cathode end
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ANSWER :
D. Cylindrical body with a colored band (stripe) marking the cathode end