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Chapter 4: Q21DQ (page 808)

The two plates of a capacitor are given charges {Q. The capacitor is then disconnected from the charging device so that the charges on the plates can’t change, and the capacitor is immersed in a tank of oil. Does the electric field between the plates increase, decrease, or stay the same? Explain your reasoning. How can this field be measured?

Short Answer

Expert verified

the outer radius is

the charge per unit length is

Step by step solution

01

About electric field between the plates

The voltage is commonly referred to as the electric potential difference and can be measured using a voltmeter.The electrical potential difference between the two plates is expressed as V=Ed, the electric field strength times the distance between the plates.

02

Determine the electric field between the plates increase, decrease, or stay the same

the Capacitance for thencylindercapacitance is

L represent the length of cylinder a represent the inner side b represent the outer side

03

Determine the outer radius

Therefore the outer radius is

04

Determine Charge per unit length

Therefore the charge per unit length is

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