Banking Class 12 Economics Notes: Central Bank vs Commercial Bank & MCQ
Research Publication • 2027 Edition
Banking: Commercial
& Central Bank
A definitive research framework for CBSE Class 12. Mastering credit creation mechanics and the RBI monetary nexus.
Financial Intermediation Logic
The Definition of Commercial Banking
As an economics professor, I define a Commercial Bank as a profit-seeking institution that acts as the circulatory system of the economy. They accept deposits from surplus units (savers) and advance loans to deficit units (investors/consumers). The difference between interest charged and interest paid is the Spread.
Accepting Deposits
"The Inflow Valve"
- • Demand Deposits: High liquidity, withdrawable via cheque at any time.
- • Time (Fixed) Deposits: Locked for a specific period; earns higher interest.
Advancing Loans
"The Outflow Valve"
- • Cash Credits: Lending against current assets of a business.
- • Overdrafts: Allowing customers to overdraw their current accounts.
Money Creation Mechanics
Commercial banks possess the unique power to "create" money. They do not lend physical cash; they create Derivative Deposits. This process is restricted only by the Legal Reserve Ratio (LRR) mandated by the Central Bank.
// LRR consists of CRR (Cash Reserve Ratio) and SLR (Statutory Liquidity Ratio).
Research Paradox: Primary vs. Derivative
A Primary Deposit is actual cash brought into the bank by a saver. A Derivative Deposit is a secondary deposit created by the bank when it grants a loan and opens an account for the borrower. Money supply increases only through derivative deposits.
Credit Creation Lab
Money Multiplier (K)
5.0
Step-by-step Generation Table (Scroll Right →)
| Round | Deposits | LRR (Reserves) | Loans (Credit) |
|---|---|---|---|
| TOTAL | ₹0 | ₹0 | ₹0 |
The Reserve Bank of India
The Reserve Bank of India (RBI) is the apex institution that governs the monetary architecture. Unlike commercial banks, its primary motive is not profit, but Monetary Stability and Growth.
1. Bank of Issue
The sole authority to issue paper currency. **Note:** One-rupee notes and coins are issued by the Ministry of Finance, but distributed by RBI.
2. Banker to the Government
RBI maintains govt treasury accounts, manages public debt, and acts as a financial advisor to the central and state governments.
3. Banker's Bank & Supervisor
It acts as a custodian of cash reserves of commercial banks and supervises their operations to ensure stability (licensing, inspection).
4. Lender of Last Resort
Crucial board concept: RBI provides emergency liquidity to commercial banks facing a crisis when all other sources are exhausted.
The Monetary Valves
| Quantitative Instrument | To Combat Inflation (High AD) | To Combat Deflation (Low AD) |
|---|---|---|
| Repo Rate / Bank Rate | INCREASE (Loans Expensive) | DECREASE (Loans Cheap) |
| CRR / SLR | INCREASE (Less Loanable Funds) | DECREASE (More Loanable Funds) |
| Open Market Ops (OMO) | SELL Securities (Sucks Cash) | BUY Securities (Injects Cash) |
Qualitative (Selective) Controls:
Instruments like Margin Requirements (the gap between security value and loan amount) and Moral Suasion (RBI advice) target the *direction* of credit rather than its total volume.
Academic Advisory
Numerical precision in 'Total Deposits' vs 'Money Creation' is the barrier between a 95 and 100. Master the derivation of Multipliers with our research lab.
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