Analyze the provided image and extract information about the graph, the accompanying text, and the electrical circuit diagram.

Graph Analysis:

The graph shows a relationship between two variables. The x-axis is labeled 'кДж' (kilojoules) and ranges from 0 to 40, with major tick marks every 10 units. The y-axis is not explicitly labeled but has major tick marks at 0, 20, 40, 60, and 80. The graph displays a piecewise linear function. It starts at (0, 0), rises linearly to approximately (5, 20), then rises linearly to (30, 40). From 30 to 40 on the x-axis, the graph shows a constant value of 40 on the y-axis. There is a horizontal line at approximately y=60, and another line segment from approximately (30, 40) to (40, 70).

Text Analysis:

The text appears to be a physics problem description. It mentions a student named Masha conducting a physics experiment. She observed that when the slider of a rheostat is moved to the extreme right position, the current is 0.5 A, and in the extreme left position, the current is 1 A. The text then asks to determine the ratio of resistances, assuming the voltage does not change.

Electrical Circuit Diagram Analysis:

The diagram shows an electrical circuit containing the following components:

• A power source (likely a battery or DC power supply) on the left.
• A switch, which is depicted in the 'closed' position.
• A rheostat (variable resistor), shown as a coil of wire with a sliding contact.
• A light bulb, serving as a load.
• An ammeter (instrument for measuring current), connected in series with the other components. It appears to be showing a reading on its display.
• Wires connecting all components in a series circuit configuration.