Content protected from screenshots
GKFix.in
General Knowledge
Categories
Concept Builder Quiz
About Us
Start Quiz
Home
My Profile
General Knowledge
Categories
Concept Builder
Start Quiz
Logout
GKFix MCQ Question
Test your knowledge and learn something new
Home
ELECTRONIC DEVICES
Question #94034
Back to Home
View All ELECTRONIC DEVICES Questions
54 Views
Question
A concave mirror has a radius of curvature of 40 cm. What is its focal length?
A. +20 cm
B. –20 cm
C. +40 cm
D. –40 cm
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
What determines the extent of conductivity in a semiconductor?
61
A convex lens of focal length 20 cm is combined with a concave lens of focal length 40 cm. What is t...
22
Which of the following best describes a semiconductor junction?
68