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


13.
A typical LED has:
A.
Disc shape
B.
Color bands
C.
Clear or colored plastic dome; two leads of different lengths (longer = anode, shorter = cathode)
D.
A bold stripe
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ANSWER :
C. Clear or colored plastic dome; two leads of different lengths (longer = anode, shorter = cathode)
14.
How can you distinguish a resistor from a diode by visual inspection?
A.
Resistor is bigger always
B.
Just by color
C.
Same appearance
D.
Resistor has color bands all around; diode has a single colored band on one end only
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ANSWER :
D. Resistor has color bands all around; diode has a single colored band on one end only
15.
How can you distinguish an LED from a diode by visual inspection?
A.
LED is in a clear/colored plastic dome with leads of different lengths; diode is in a small black cylinder
B.
Same appearance
C.
Diode has a dome
D.
LED has color bands
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ANSWER :
A. LED is in a clear/colored plastic dome with leads of different lengths; diode is in a small black cylinder
16.
How can you distinguish a ceramic capacitor from a resistor by visual inspection?
A.
Resistor is disc
B.
Capacitor is disc-shaped without color bands; resistor is cylindrical with color bands
C.
Capacitor has bands
D.
Same shape
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ANSWER :
B. Capacitor is disc-shaped without color bands; resistor is cylindrical with color bands
17.
In an electrolytic capacitor, the polarity is indicated by:
A.
Just at random
B.
No marking
C.
Color bands
D.
A stripe (usually black or silver) on the negative side; the longer lead is positive
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ANSWER :
D. A stripe (usually black or silver) on the negative side; the longer lead is positive
18.
If a component has a polarity marking (stripe or shorter/longer leads), it is most likely:
A.
A resistor
B.
Just decorative
C.
An LED, an electrolytic capacitor, or a diode (all polarity-sensitive)
D.
A ceramic capacitor
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ANSWER :
C. An LED, an electrolytic capacitor, or a diode (all polarity-sensitive)