7) A primary coil is hooked up to a battery that supplies a constant current through a solenoid coil at a voltage of 1.5VDC. The primary coil has 10 turns and the secondary coil has 20 turns. If a voltage is induced in the secondary coil, determine the magnitude of this induced voltage? a) 3V b) 1.5V c) 0.75V d) 0.375V e) No voltage induced. 8) In a particular resistor hooked up to a 1.5V battery, 14Watts. What is the resistance in this resistor? a) R=6.22 Ohm b) R=31.5 Ohm. c) R=0.16 Ohm d) R=9.33 Ohm e) R=2.25 Ohm 9) What is the wave speed of a string with tension set to 10N and a linear mass density of .05kg/m? a) 14.14 m/s b) 200m/s c) 0.005m/s d) 0.707m/s e) 0.5m/s

#11 Step Up Transformer A transformer primary coil has 2,300 windings, while the sec- ondary coil has 12,400 windings. If the primary coil is operated at a RMS voltage of 10.0 V, what is the RMS voltage in the secondary coil? A. 1.86 V В. 24.1 V С. 53.9 V D. 120 V

1) thanks for the help