Initial conditions for RLC circuit
Just think about how you derived the current of 10 amps. There is a 100 volt supply and there is a 10 ohm resistor - to calculate 10 amps it must mean that all the voltage is across the resistor so, what voltage is across the inductor?

Or, put another way, V = L di/dt and, because the circuit is in steady state (your words not mine), this implies the current is also "steady" so, using that formula, what is the voltage across the inductor?