Ammeter reads current based on needle position relative to full-scale mark

Steps:

• Identify full-scale deflection as 2.0 A on the ammeter scale.
• Observe needle position on the diagram to estimate fraction of full scale.
• Calculate current as fraction times 2.0 A.
• Compare calculated value to choice values; not enough information on diagram or choices to compute precisely.

Why B is correct:

• B matches the current value corresponding to the needle's position, per ammeter calibration definition where deflection is proportional to current.

Why the others are wrong:

• A overestimates the deflection fraction.
• C underestimates the deflection fraction.
• D ignores the scale calibration entirely.

Not enough information on diagram and choices for exact calculation.

Final answer: B