Simplified form of Voltage Formula

1. Mar 24, 2013

Typhon4ever

In my book it gives the relationship between voltage and electric field as Vb-Va= -$\int _a^{b}$ E dl which for a positively charged conducting sphere Q simplifies to $\frac{Q}{4\pi\epsilon_0} (\frac{1}{b}-\frac{1}{a})$ my questions is that shouldn't it be $\frac{Q}{4\pi\epsilon_0} (\frac{1}{a}-\frac{1}{b})$? The integral turns into $\int _b^{a}$ what am I missing here?

2. Mar 24, 2013

Typhon4ever

Nvmind I got it I feel stupid lol