MANGALORE: Karnataka Bank has revised the interest rates on FCNR (B) deposits for various maturities with effect from August 1. British pound sterling deposits for one year only will now fetch an interest rate of 5.04 per cent against 5.01 per cent earlier. Likewise, the U.S. dollar will earn an interest of 5.54 per cent (5.69 per cent) and euro 3.55 per cent (3.52 per cent).