JAMB Physics questions: Introductory electronics

10 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Introductory electronics· JAMB

   In a p-type semiconductor, the majority charge carriers are

   • Aelectrons
   • Bholes
   • Cprotons
   • Dions

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   Explanation and discussion

2. Question 2· Introductory electronics· JAMB

   Which of the following is a semiconductor?

   • Arubber
   • Bcopper
   • Csilicon
   • Dglass

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   Explanation and discussion

3. Question 3· Introductory electronics· JAMB

   The majority charge carriers in a p-type semiconductor are

   • Aelectrons
   • Bholes
   • Cprotons
   • Dneutrons

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   Explanation and discussion

4. Question 4· Introductory electronics· JAMB

   A diode is used in circuits because it

   • Ameasures current
   • Bstores charge
   • Cincreases voltage
   • Dallows current to flow in one direction only

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   Explanation and discussion

5. Question 5· Introductory electronics· JAMB

   A semiconductor doped with a pentavalent impurity such as phosphorus is

   • Aintrinsic
   • Bp-type
   • Cn-type
   • Dan insulator

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   Explanation and discussion

6. Question 6· Introductory electronics· JAMB

   Rectification is the process of

   • Aamplifying a signal
   • Bconverting d.c. to a.c.
   • Cconverting a.c. to d.c.
   • Dstoring charge

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7. Question 7· Introductory electronics· JAMB

   A transistor can be used as

   • Aa battery
   • Ba rectifier only
   • Ca capacitor
   • Dan amplifier or a switch

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   Explanation and discussion

8. Question 8· Introductory electronics· JAMB

   A p-n junction diode conducts when:

   • Areverse biased
   • Bunbiased
   • Cforward biased
   • Dheated

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   Explanation and discussion

9. Question 9· Introductory electronics· JAMB

   A diode connected with its n-side to the positive terminal of a battery

   • Abecomes a capacitor
   • Bconducts strongly
   • Cglows
   • Ddoes not conduct, because it is reverse biased

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10. Question 10· Introductory electronics· JAMB

    A p-n junction diode is forward-biased when

    • Athe n-side is connected to the positive terminal
    • Bthe p-side is connected to the positive terminal
    • Cno voltage is applied
    • Dit is heated

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    Explanation and discussion