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. Q11
Question 11

A concave lens of focal length 20cm forms an image 1/2 the size of the object. The object distance is

  • A.100 cm
  • B.30 cm
  • C.60 cm
  • D.40 cm
Objective

Question details

Exam body
NDA
Subject
Physics
Year
2019/2020
Question no.
#11
Type
Objective
Previous · Q10Which of these is not a fundamental S.I. unit Next · Q12 The quality of sound depends on

More from this paper

  • Q7The equation 150 62 X → 150 63 Y + K, represents
  • Q8Which of the following radiations cannot be deflected by an electric field or…
  • Q9The half-life of a radioactive element is 9 days. What fraction of atoms has…
  • Q13A student with a sight defect has a least distance of distinct vision of 150 cm…
  • Q14A dynamo primarily converts
  • Q15Three capacitors 2μF, 3μF, and 6μF are connected in series. If the pd across the…
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