Question

P-medium current intensity-20 number of turns
Q-low current intensity-20 number of turns
R-low current intensity-15 number of turns

Which list shows the electromagnets in order from strongest magnetic force to weakest magnetic force
A.R,P,Q
B. P,q,r
C. Q,r,p
D. R,Q,P

Answer 1

To determine the strength of the electromagnets based on the provided information, we consider two main factors: the current intensity and the number of turns of the coil.

- **P (medium current intensity, 20 turns)**: The current is medium, and it has a decent number of turns.
- **Q (low current intensity, 20 turns)**: Eventually has the same number of turns as P but with low current intensity.
- **R (low current intensity, 15 turns)**: Has lower current and fewer turns than both P and Q.

Given this, we can analyze the electromagnets in terms of magnetic force strength:

1. **P** is likely the strongest due to its medium current and maximum number of turns.
2. **Q** comes next because it has the same number of turns as P but with low current intensity, which means it should produce a weaker magnetic field compared to P.
3. **R** would be the weakest, having both low current intensity and fewer turns than the other two.

Putting this all together, the order from strongest to weakest magnetic force is **P, Q, R**.

Thus, the answer is **B. P, Q, R**.