Current flows through the wire coil in the direction shown by the arrows. What is the direction of the magnetic field inside the coil?
(Image shows arrow pointing up into the right side of the coil and pointing down at the left side of the coil)
a. upward
b. downward
c. toward the left
d. towards the right
(Is it d?)
What type of current? electron current, or the conventicle used positive current?
I am not certain of the diagram here, and what type current you mean. Check your text for that, then you will find a left hand or right hand current rule that will answer it.
To determine the direction of the magnetic field inside the wire coil, you can use the right-hand rule for electromagnetism. Here's how to apply the rule:
1. Extend your right hand and align your thumb with the current direction in the coil.
2. Curl your fingers around the wire in the direction of the arrow.
3. The direction your fingers point, inwards or outwards from your hand, indicates the direction of the magnetic field inside the coil.
In this case, with the current flowing up into the right side of the coil and down at the left side of the coil as indicated by the arrows, if you follow the right-hand rule, your fingers curl inwards towards yourself. Therefore, the correct answer is (b) downward.