Q. What do you mean by multiplier effect?
Loans and deposits in banks give rise to a significant multiplier effect. We use a simple instance to explain this effect. Consider the bank K-bank with total deposits of 10,000 (millions or whatever). K-bank is aiming for a reserve ratio of 10% of deposits. At the instance it has lent 9,000 and has 1,000 in reserve - exactly meeting their desired reserve ratio.