task_physics__wire_magnetism__wire_field_direction_choice

Summary

• Domain: physics
• Scene id: wire_magnetism
• Implementation scene: wire_magnetism
• Implementation source: src/trace_tasks/tasks/physics/wire_magnetism/wire_field_direction_choice.py

Program Contract

Program: option_letter(direction(right_hand_rule_around_page_perpendicular_wire(current_page_direction, point_p_position))); scene=wire_magnetism; scope=wire_field_direction_choice

Candidate set: the visible page-perpendicular current-carrying wire, dot/cross current cue, point marker, and magnetic-field arrow options inside the wire_field_direction_choice objective scope. Operands: current_page_direction (semantic_role, allowed visible_dot_or_cross_current_symbol, source program_schema_concrete); point_p_position (semantic_role, allowed visible_marked_point_position_around_wire, source program_schema_concrete). Operation: evaluate option_letter over the candidate set using the visible quantities, relations, branch semantics, and formulas encoded in the program expression; generation enforces a unique final answer. Output binding: answer uses the option_letter schema; The answer value is the selected visible option letter. Annotation witnesses: bbox_map witnesses from the finalized render. Annotation is keyed because witness roles are distinct; keys include wire_current and point_p. Annotation must mark minimal visual witnesses from the final rendered diagram, not answer labels, option choices, decorative chrome, or derived numeric annotations unless those are the queried visual witnesses. Query ids: single.

Reasoning Operations

Families: spatial_relations

Task Contract

Selects the in-plane magnetic-field arrow direction at a marked point near a wire carrying current into or out of the page.

Query Branches

Query id	Program schema
single	option_letter(direction(right_hand_rule_around_page_perpendicular_wire(current_page_direction, point_p_position))); scene=wire_magnetism; scope=wire_field_direction_choice

Program Metadata

• Program signatures: physics.wire_field_direction_choice
• Base program contract: option_letter(direction(right_hand_rule_around_page_perpendicular_wire(current_page_direction, point_p_position))); scene=wire_magnetism; scope=wire_field_direction_choice
• Parameter axes: fixed_query
• Arguments:
• current_page_direction: semantic_role; allowed visible_dot_or_cross_current_symbol; source program_schema_concrete
• point_p_position: semantic_role; allowed visible_marked_point_position_around_wire; source program_schema_concrete
• Argument metadata status: curated
• Supported query ids: single

Answer Contract

• Answer schema: option_letter
• Generator answer_gt.type: option_letter
• The answer value is the selected visible option letter.

Annotation Contract

• Annotation schema: bbox_map
• Generator annotation_gt.type: bbox_map
• Annotation is keyed because witness roles are distinct; keys include wire_current and point_p.
• Annotation must mark minimal visual witnesses from the final rendered diagram, not answer labels, option choices, decorative chrome, or derived numeric annotations unless those are the queried visual witnesses.
• Annotation and answer must be projected from the same generated execution trace, not inferred from pixels or prompt text.

Prompt And Trace Requirements

• Prompt text must come from src/trace_tasks/resources/prompts/physics/wire_magnetism/physics_wire_magnetism_v1.json, with scene and task/query layers selected deterministically and recorded in metadata.
• Render randomness, sampled fonts/styles, query operands, formula quantities, and verifier payloads must be explicit in the instance trace.
• Diagrams must keep all quantities required for the physics computation visible or explicitly stated by the task prompt contract.