A dialysis machine employs two solenoid valves which work to control blood flow thru the machine by allowing precise magnetic control of a movable iron core thru them. If one of the solenoids has current 0.1 A and 1000 turns, what is the generated magnetic field magnitude and direction?

In an electric motor, a coil with 131 turns of radius 2.20 cm can rotate between the poles of a magnet. The magnetic field magnitude is 0.200 T. When the current through the coil is 40.3 mA, what is the maximum torque that the motor can deliver?

A mass spectrometer is used to examine the isotopes of uranium. Ions in the beam emerge from the velocity selector at a speed of 2.96 ✕ 105 m/s and enter a uniform magnetic field of 0.605 T directed perpendicularly to the velocity of the ions. What is the distance between the impact points formed on the photographic plate by singly charged ions of 235U and 238U??? cm

The Venus flytrap (Dionaea muscipula) is a carnivorous plant native to the East Coast of the United States. The plant uses rapid electrical signaling to close its leaf traps when triggered by an insect. This signaling generates action potentials like those in human nerve and muscle cells. The figure shows a trap’s action potential in green, and its corresponding magnetic field in blue (Fabricant et al., 2021). Such measurements of plant magnetic fields could be used in future plant diagnostics, just as MRIs are used in medical imaging today. If the resistance (R) of the trap is 0.97 x 106 Ω, and the action potential is V = 9 x 10-3 V, what is the current (I)? Show your calculations below and give your answer to two significant figures with the units. Hint: use Ohm’s law: I = V/R, substitute the given values to find the current (I) in amperes (A).   Calculations: Answer: