Magnetic Field of a Long Wire: The magnetic field at a distance of 2 cm from a long straight current-carrying wire is 4 ?T. What is the magnetic field at a distance of 4 cm from this wire?
A. 2 ?T
B. 4 ?T
C. 6 ?T
D. 8 ?T
E. 10 ?T
Answer: A
You might also like to view...
What is the explanation for the pattern of granulation seen on the visible surface of the Sun?
a. The granules form the base of a circulation pattern that extends from the photosphere to the outer corona. b. The granules are regions of nuclear energy generation in the Sun's photosphere. c. Each granule contains a strong magnetic field, which compresses and heats the gas underneath it. d. The granules are the tops of hot gas that have risen from the Sun's convective zone.
The peak wavelength in the continuum emission spectrum of a body is inversely proportional to its ____________________
Fill in the blank(s) with correct word
Spectral Series: What is the longest wavelength in the Balmer series?
A. 240 nm B. 328 nm C. 365 nm D. 656 nm E. 820 nm
How is it possible that orphan planets are potentially habitable, even though they do not orbit a star?
What will be an ideal response?