# Homework Help: Dimensions of Ponyting Vector

1. Jun 15, 2011

### PhDorBust

Sorry for the trivial question. But I'm not a physics student by training and I think I running into problems due to interchanging metrical systems.

$$S = E \times H$$

$$E \equiv \frac{N}{C}$$

$$H \equiv \frac{N}{A \cdot m}$$

Also, is there any standard operator for denoted dimensions of a quantity? The answer should be power per unit area - I get some extra charge dimensions among other things. Cross product should behave dimensionally as normal multiplication.

2. Jun 15, 2011

### ehild

The dimension of H is current/length so the unit is A/m.

ehild