In a solar system far far away, the sun\'s intensity is 200 W/m2 for a planet lo
ID: 1270606 • Letter: I
Question
In a solar system far far away, the sun's intensity is 200 W/m2 for a planet located a distance R away. What is the sun's intensity for a planet located at a distance 4 R from the Sun? W/m2
In a not so far away solar system, the sun's intensity is 30 W/m2 for a planet located a distance R away. What is the sun's intensity for a planet located at a distance R/5 from the Sun? W/m2
Unpolarized light of intensity 40 W/m2 is incident on polarizer #1. After passing through polarizer #1, the light then passes through polarizer #2 whose transmission axis is at 30 degrees to that of polarizer #1. What is the intensity of the light transmitted through polarizer #2? (in units of W/m2)
A magnetic B field of strength 4 T is perpendicular to a conducting loop of wire measuring 0.4 square meters with 40 turns. If the B field is linearly reduced to zero in 6 s, then what is the magnitude of the induced emf voltage? (in units of V)
A transformer has 570 primary and 200 secondary turns. An alternating potential of 100 V is applied to the primary. What is the secondary potential? (in V)
The current increases from 25 mA to 50 mA in a 20 mH inductor over 10 s. What is the induced emf across the inductor? (in V)
Explanation / Answer
Step 1 : According to inverse square law
Intensity