The power of a light bulb is 100 W on a circular disk of radius 2 mm at a distance of 1m.What is the power on a 4-mm disk at a distance of 2 m from the same bulb?
A) 25 W
B) 50 W
C) 100 W
D) 200 W
E) 400 W
Correct Answer:
Verified
Q50: What is the direction of the net
Q51: A 10-mW vertically polarized laser beam passes
Q52: The unit of the quantity
Q53: An electric field has strength E =
Q54: A 10-mW vertically polarized laser beam passes
Q56: A house with a south-facing roof installs
Q57: Unpolarized light of intensity 200 W/m2
Q58: The intensity of polarized light decreases
Q59: A parallel plate capacitor with radius
Q60: A focused 100 W spotlight delivers 50%
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents