# Homework Help: Calculate leakage resistance

1. May 16, 2009

### tommoturbo

1. Calculate the leakage resistance across a capacitor of 100pF that has a relative permittivity of 12 and a resistivitty of rho=10*14

2. Rl=rho x Er x Eo /C
Rl=10*14 x 12 x 8.85*-12 / 100*-12

3. Rl=1.062*15

surley the leakage resistance cant be that high my freind said it should be this formula

2. May 17, 2009

### overt26

I calculated

$$R_{leak}=1.062\times10^{14}$$ ohms

Sure it's a big value - not something you measure with a multimeter! - but an ideal capacitor would have infinite leakage resistance.