1. An airgap capacitor is charged to 10 V then disconnected. If a material is ad

Question

1. An airgap capacitor is charged to 10 V then disconnected. If a material is added to the gap between the plates and the voltage drops to 3.33 V what is the dielectric constant of the material?
2. An emf of 10 V is applied to the coil with an inductance of 40 mH and a resistance of 5.00 ohms. determine the energy stored in the magnetic field when the current reaches its maximum value. 1. An airgap capacitor is charged to 10 V then disconnected. If a material is added to the gap between the plates and the voltage drops to 3.33 V what is the dielectric constant of the material?
2. An emf of 10 V is applied to the coil with an inductance of 40 mH and a resistance of 5.00 ohms. determine the energy stored in the magnetic field when the current reaches its maximum value.
2. An emf of 10 V is applied to the coil with an inductance of 40 mH and a resistance of 5.00 ohms. determine the energy stored in the magnetic field when the current reaches its maximum value.

Explanation / Answer

V' = V/k

K = V/V' = 10/3.33 = 3

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2) i = 10/5 = 2 A

E = 0.5*L*i^2 = 0.5*40*10^-3*2^2 = 0.08 j

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