A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?
A. 3.2 mT
B. 2.8 mT
C. 2.4 mT
D. 3.6 mT
E. 3.0 mT
Answer: C
You might also like to view...
The universe expanded by a factor of 1050 during inflation, when the strong force separated from the electromagnetic and weak nuclear forces
Indicate whether the statement is true or false
An extrasolar planet is
a. a planet that orbits our Sun that we have not yet discovered. b. one not needed for the formation of our solar system which is kept in a special area just in case. c. a planet found orbiting around a star other than the Sun. d. another name for an asteroid. e. a planet extra close to our Sun.
The gravitational pull of Earth acting on an object is zero when the object
a. has zero acceleration. b. is in free fall. c. is midway between Earth and the Moon. d. is in orbit around Earth. e. none of these
If a light-weight stable nucleus has 12 neutrons, the atomic mass is expected to be about:
a. 6 b.12 c.18 d.24 e.36 amu.