Chapter 23: Q81PE (page 863)
What capacitance should be used to produce a\(2.00\,{\rm{M\Omega }}\)reactance at\(60.0\,{\rm{Hz}}\)?
Short Answer
The capacitance used to produce a reactance is obtained as, \(1.33\,{\rm{nF}}\).
Chapter 23: Q81PE (page 863)
What capacitance should be used to produce a\(2.00\,{\rm{M\Omega }}\)reactance at\(60.0\,{\rm{Hz}}\)?
The capacitance used to produce a reactance is obtained as, \(1.33\,{\rm{nF}}\).
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Get started for freeVerify that after a time of \(10.0{\rm{ }}ms\), the current for the situation considered in Example \(23.9\) will be \(0.183{\rm{ }}A\) as stated.
Use Faraday’s law, Lenz’s law, and RHR-1to show that the magnetic force on the current in the moving rod in Figure 23.11is in the opposite direction of its velocity.
(a) An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner’s 2.00 T field with his fingers pointing in the direction of the field. Find the average emf induced in his wedding ring, given its diameter is 2.20 cm and assuming it takes 0.250 s to move it into the field. (b) Discuss whether this current would significantly change the temperature of the ring.
At what frequency will an\(80.0\,{\rm{mF}}\)capacitor have a reactance of\(0.250\,{\rm{\Omega }}\)?
(a) What current flows when a\(60.0{\rm{ }}Hz,{\rm{ }}480{\rm{ }}V\)AC source is connected to a 0\(0.250{\rm{ }}\mu F\)capacitor? (b) What would the current be at\(25.0{\rm{ }}kHz\)?
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