8. [-/1 Points] DETAILS OSCOLPHYS2016 23.5.P.028. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Calculate the peak voltage (in V) of a generator that rotates its 195 turn, 0.100 m diameter coil at 3600 rpm in a 0.790 T field. + Additional Materials Reading 9. [-/1 Points] DETAILS OSCOLPHYS2016 23.5.P.029. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER At what velocity (in revolutions per minute) will the peak voltage of a generator be 485 V, if its 525 turn, 8.00 cm diameter coil rotates in a 0.250 T field? rpm10. [-/1 Points] DETAILS OSCOLPHYS2016 23.6.P.039. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose a motor connected to a 135 V source draws 22.0 A when it first starts. (a) What is its resistance (in ()? (b) What current (in A) does it draw at its normal operating speed when it develops a 100 V back emf? Additional Materials Reading 11. [-/1 Points] DETAILS OSCOLPHYS2016 23.6.P.043. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The motor in a toy car is powered by four batteries in series, which produce a total emf of 6.00 V. The motor draws 3.05 A and develops a 4.50 V back emf at normal speed. Each battery has a 0.100 0 internal resistance. What is the resistance (in () of the motor? +12. [I1 Points] DETAILS OSCOLPHYSZO16 23.7.P.046. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A cassette recorder uses a plug-in transformer to convert 120 V to 12.0 V, with a maximum current output of 355 mA. (a) What is the current input (in mA)? mA (b) What is the power input (in W)? W (c) Is this amount of power reasonable for a small appliance? 0 Yes 0 No 15. [/1 Points] DETAILS OSCOLPHYSZO16 23.9.P.055. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Two coils are placed close together in a physics lab to demonstrate Faraday's law of induction. A current of 9.00 A in one is switched off in 2.00 ms, inducing a 2.00 V emf in the other. What is their mutual inductance (in mH)? mH Additional Materials I22 Reading 16. [-I1 Points] DETAILS OSCOLPHYSZO16 23.9.P.060. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Camera flashes charge a capacitor to high voltage by switching the current through an inductor on and off rapidly. In what time (in 5) must the 0.200 A current through a 2.10 mH inductor be switched on or off to induce a 440 V emf? |:ls 1. 17. [-I1 Points] DETAILS OSCOLPHYSZO16 23.10.P.069. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER If you want a characteristic RL time constant of 3.00 s, and you have a 290 Q resistor, what value of self-inductance (in H) is needed? H Additional Materials ill Reading 18. [I1 Points] DETAILS OSCOLPHYSZO16 Z3.10.P.070. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Your RL circuit has a characteristic time constant of 21.5 ns, and a resistance of 5.00 MD. (a) What is the inductance (in H) of the circuit? H (b) what resistance (in M0) should you use (instead of the 5.00 M) resistor) to obtain a 1.00 ns time constant, perhaps needed for quick response in an oscilloscope? M0 19. [-/1 Points] DETAILS OSCOLPHYS2016 23.11.P.079. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER At what frequency (in Hz) will a 65.0 mH inductor have a reactance of 635 0? Hz + Additional Materials Reading 20. [-/1 Points] DETAILS OSCOLPHYS2016 23.11.P.081. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER What capacitance (in nF) should be used to produce a 2.25 MQ reactance at 56.0 Hz? nF