Ex. 59: Find the capacitive reactance of 10 µF capacitor when it is a part of a circuit whose frequency is 50 Hz.

An LRC circuit contains a 700-Ω resistor, a 7.00-Hcoil, and an unknown capacitor. The circuit resonates at1000 Hz. What is the value of the capacitance ?? The resonant frequency of an LRC circuit is 425 Hz.If the resistance is 300 Ω and the capacitance is 200 nF, what is the value of the inductance ??

A 45.8 F capacitor is connected to a 6.2 V, 208 Hz source. What is the capacitive reactance (in ohms)?

A) 0.82 MU B) 0.3 fe 66. A 35-µF capacitor is connected to an ac source of emf with a frequency of 250 Hz and a maximum emf of 20 V. If the voltage across the capacitor is zero at time = 0, what is the voltage at time = 3.0 ms? Assume the phase constant is zero. A)-20 V B)-10 V C) 0 V D) 10 V E) 20 V 75. An electron in a hydrogen atom moves in a circle of radius 1.1 x 10-10 m at a speed of about 1.6 x 106 m/s. What is the magnetic dipole moment of this electron due to its orbital motion? A) 9.3 x 10-24 J/T B) 1.4 x 10-23 J/T C) 1.9 x 10-23 J/T D) 2.8 x 10-23 J/T