Question

question 10 (1 point)
a current carrying loop of wire lies flat on a table top. when viewed from above, the current moves around the loop in a counterclockwise sense. what is the direction of the magnetic field caused by this current, outside the loop? the magnetic field
circles the loop in a clockwise direction.
circles the loop in a counterclockwise direction.
points straight up.
points straight down.

Explanation:

To determine the magnetic field direction outside a current - carrying loop, we use the right - hand rule. For a current - carrying loop, when the current is counterclockwise (viewed from above), the magnetic field inside the loop points straight up (by the right - hand rule: curl the fingers of your right hand in the direction of the counterclockwise current, and your thumb points in the direction of the magnetic field inside the loop). By the nature of magnetic field lines (they form closed loops), the magnetic field outside the loop will point straight down. Let's analyze the other options:

• Option 1 (circles the loop in a clockwise direction): The magnetic field around a current - carrying loop is not a circular loop - like direction outside in this way. The right - hand rule for a loop gives a different pattern of field direction (radial and axial components, with the dominant axial component outside being opposite to the inside).
• Option 2 (circles the loop in a counterclockwise direction): Similar to the first wrong option, the magnetic field outside the loop does not have a circular, counterclockwise direction around the loop.
• Option 3 (points straight up): This is the direction of the magnetic field inside the loop, not outside.

Answer:

D. points straight down.