Magnetic field around a wire and inside a coil
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A long straight wire carries 6 A. What is the field 3 cm from it, to 0.01 μT, Ari? Use μ₀ = 4π × 10⁻⁷ T·m/A.
A long straight wire carries 1.5 A. What is the field 0.5 cm from it, to 0.01 μT, Bo? Use μ₀ = 4π × 10⁻⁷ T·m/A.
A long straight wire carries 10 A. What is the field 8 cm from it, to 0.01 μT, Kira? Use μ₀ = 4π × 10⁻⁷ T·m/A.
Read this first
Use this
Field-line diagram (example data):
In the diagram, which way does the field point at P, to the right of the wire, Jun?
- Out of the page
- Into the page
- Straight away from the wire
In the diagram, which way does the field point at Q, to the left of the wire, Luz?
Use the picture in question 4.
- Straight toward the wire
- Into the page
- Out of the page
In the end-on diagram, which way do the field circles run, Milo?
- Clockwise, seen from the front
- Out from the wire like spokes
- Counterclockwise, seen from the front
In the end-on diagram, why are the circles farther apart away from the wire, Pia?
Use the picture in question 6.
- The field lines point toward the wire
- The field weakens as 1 ÷ r
- The current slows down farther out
In the solenoid diagram, what is the field like inside, near the middle, Tala?
- Strongest near the wire of each turn, weak at the center
- Nearly uniform: straight and evenly spaced
- Zero, since the turns cancel
In the solenoid diagram, what is the field like outside the solenoid, Zee?
Use the picture in question 8.
- The same as inside
- Stronger than inside
- Nearly zero
What does n stand for in B = μ₀nI, by Esme's reading (OpenStax)?
- The number of turns per meter
- The width of each turn
- The total length of wire