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 #94048
Back to Home
View All ELECTRONIC DEVICES Questions
29 Views
Question
If the power of a lens is –4 D, what is its focal length?
A. +25 cm
B. –25 cm
C. +40 cm
D. –40 cm
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
If the angle of refraction is 38° and sin r = 0.6181, what is the refractive index of the medium if...
8
How does the number of conduction electrons from doping compare to those from intrinsic generation?
10
What is the state of the semiconductor at very low temperatures as per Figure 14.4?
23