Defibrillators are a class of medical devices that deliver a large quantity of e
ID: 1625232 • Letter: D
Question
Defibrillators are a class of medical devices that deliver a large quantity of electric energy to a patient’s heart. This energy is stored up in capacitors until it is allowed to flow into the patient. A certain material has a dielectric constant of 2.0. What is the effect of placing this material between the plates of a parallel plate capacitor?
A. Capacitance is increased by a factor of 2.
B. Capacitance is decreased by a factor of 2.
C. Capacitance is increased by a factor of 4.
D. Capacitance is decreased by a factor of 4.
Defibrillators are a class of medical devices that deliver a large quantity of electric energy to a patient’s heart. This energy is stored up in capacitors until it is allowed to flow into the patient. A certain material has a dielectric constant of 2.0. What is the effect of placing this material between the plates of a parallel plate capacitor?
A. Capacitance is increased by a factor of 2.
B. Capacitance is decreased by a factor of 2.
C. Capacitance is increased by a factor of 4.
D. Capacitance is decreased by a factor of 4.
Explanation / Answer
A.Capacitance is increased by a factor of 2.
solution:
C = A0/d
when material is placed with K=2
= 20
option A), is true
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