Author Question: A circular loop carrying a current of 3.0 A is oriented in a magnetic field of 0.35 T. The loop has ... (Read 264 times)

Awilson837 · **on:** Jul 28, 2018

A circular loop carrying a current of 3.0 A is oriented in a magnetic field of 0.35 T. The loop has an area of 0.24 m2 and is mounted on an axis, perpendicular to the magnetic field, which allows the loop to rotate. What is the torque on the loop when its plane is oriented at a 50 angle to the field?
a. 4.6 Nm
c. 0.076 Nm
b. 0.16 Nm
d. 0.23 Nm

Question 2

A pipe of diameter 4 cm is replaced by one of the same length but of diameter 5 cm. If the pressure difference between the ends of the pipe remains the same, by what factor is the rate of flow of a viscous liquid through it changed?
a. 5.1
c. 2.4
b. 3.4
d. 1.5