Physics crossword 6

Across

• 1. The point where light from a very distant object on the axis of the lens is brought to focus by the lens, for converging lenses.( Also called the focus) (5, 5)
• 5. A unit for flux density, the force per unit current per unit length of conductor perpendicular to the lines of magnetic flux (5)
• 6. The p.d. applied to a sensor circuit (frequently a potential divider) (5, 7)
• 8. A reaction in which the products of one reaction go on to start one or more further reactions (5, 8)
• 9. For a magnetic circuit = flux/current-turns (9)