b) The deflecting torque of an instrument is directly proportional to the square of the current flowing through it. If a current of 12A produces a deflection of 90°, what deflection would occur for the values of current in the table below when the instrument is (1) Gravity controlled and (2) Spring controlled? State your comments on the results. 1 2 3 4 5 6 7 8 9 10 0 11 12 Current (A) Deflection Angle (0) for Gravity Control Deflection Angle (0) for Spring control

A P KN Refer to the figure. d₁ 0.9 m Force P is 60 kN and each force Q is 125 kN. Q KN B Add your answer Integer, decimal, or E notation allowed Q KN The diameter d₁ = 30 mm and diameter d₂ = 50 mm. d₂ 1.2 m What is the normal stress in rod BC in MPa? Round to the nearest integer and enter the magnitude only. C

18. What type of magnet depends on flowing current to produce a magnetic field? a. electromagnet gaiamn al 1otorn onoolo mA ES b. permanent magnet c. temporary magnet d. domain magnet