Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. NDA
  4. /
  5. Physics
  6. /
  7. 2019/2020
  8. /
  9. Q28
Question 28

Which of the following statements about a diode is correct?

  • A.Reverse bais diodes have low resistance
  • B.Forward bias diodes have high resistance
  • C.Forward bias diodes produces high current
  • D.Forward bias diodes function as a result of heat
Objective

Question details

Exam body
NDA
Subject
Physics
Year
2019/2020
Question no.
#28
Type
Objective
Previous · Q27In a nuclear fission process, the mass defect was 1.2 × 10 -5 kg… Next · Q29 In order for fibre optics to work, the incident light inside it must hit its…

More from this paper

  • Q24If M and R are the masses and radius of the earth respectively and G is the…
  • Q25An electric kettle with negligible heat capacity is rated at 2000W. If 2.0kg of…
  • Q26When current flows through a moving-coil galvanometer, the force exerted on the…
  • Q30In the earth's gravitational field.
  • Q31Two plane mirrors are inclined at angle 45° one to another. A ray of light…
  • Q32When the length of the string of a simple pendulum is L, its period is 0.5&Pi…
See all Physics 2019/2020 questions
Teacha

Africa's learning & exam readiness platform. Built for students, tutors, and schools.

Platform

  • Courses
  • Mock Exams
  • Past Questions

For You

  • I'm a Tutor
  • I'm a School
  • Pricing

© 2025 Teacha. Built for African learners, tutors, and schools. Teacha is not affiliated with WAEC, NECO, or JAMB. All past questions are sourced from publicly available materials.

Privacy PolicyTerms of UseCookie Policy