### Magnetic Field Strength and Direction at Point P #### Review and Resources - You may want to review [Page 796](#). - For help with math skills, you may want to review: - [The Vector Cross Product 1](#) - [The Vector Cross Product 2](#) #### Part A: Magnetic Field Strength **Problem Statement:** What is the strength of the magnetic field at point P in the figure? Assume the following: - \( I = 6.0 \, \text{A} \) - \( r_1 = 1.1 \, \text{cm} \) - \( r_2 = 2.2 \, \text{cm} \) **Instructions:** Express your answer to two significant figures and include the appropriate units. - **Input Box:** \[ B = \text{Value} \quad \text{Units} \] - **Action:** Click "Submit" to record your answer or "Request Answer" for guidance. #### Part B: Magnetic Field Direction **Question:** What is the direction of the magnetic field at point P in the figure? **Options:** - [ ] Into the screen - [ ] Out of the screen - **Feedback:** Click "Submit" to verify your answer. The correct answer indicates the direction is out of the screen. #### Figure Description - A semicircular conductor is shown with current \( I \). - Points \( r_1 \) and \( r_2 \) are indicated, with point \( P \) located between them. - The semicircle represents the pathway of the current. Use these details to calculate the magnetic field at point P and understand its direction.

A compass needle points 19° E of N outdoors. However, when it is placed 12.0 cm to the east of a vertical wire inside a building, it points 35 ° E of N. The Earth's field is the same at both positions of the compass, it is 0.50×10-4 T and is horizontal. What is the magnitude of the current in the wire? Express your answer using two significant figures and include the appropriate units. I = Submit Part B Value east west up μÀ What is the direction of the current in the wire? down Request Answer Units ?

The long, thin wire shown in the figure (Figure 1) is in a region of constant magnetic field B. The wire carries a current of 6.2 A and is oriented at an angle of 7.5° to the direction of the magnetic field. Part A If the magnetic force exerted on this wire per meter is 3.5×10-2 N, what is the magnitude of the magnetic field? Express your answer using two significant figures. VE ΑΣΦΑΙΡΟ B = 40 Submit Part B X Incorrect; Try Again; 29 attempts remaining Previous Answers Request Answer 0 = 3.7 Submit ? At what angle will the force exerted on the wire per meter be equal to 1.6×10-² N ? Express your answer using two significant figures. 197| ΑΣΦΑ Previous Answers Request Answer ? mT X Incorrect; Try Again; 29 attempts remaining

Define the electric field of a single charge and the magnetic force acting on a moving electric charge using the definitions and formulas in the photos.