In full capacity firm reduces price and increases supply and in low capacity firm increase price and decreases supply. Is this statement is correct ?
Seems logical.
At full capacity, you are probably at the lowest point in the average cost curve. Your price can reach lowest level too.
At low capacity, unitary fixed costs are higher than in the previous case, so your price should be higher to cover those higher costs (otherwise the company bankrupts in the short to middle-term)
Both are valid industrial / commercial strategies. Which one to pick will depend on the market type and macroeconomic scenario.
Cheers