75 MCQs 50 Flashcards Unit 5 · 6 marks weightage Updated April 2026
Macroeconomics · Unit 5

Ch 11: Foreign Exchange Rate

Understand how exchange rates are determined, the difference between fixed and flexible systems, depreciation vs devaluation, and the forces of demand and supply in the foreign exchange market.

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Foreign Exchange and Exchange Rate

Foreign Exchange refers to all currencies other than the domestic currency of a country. For India, any currency other than the Indian Rupee (USD, EUR, GBP, JPY etc.) is foreign exchange.

The Foreign Exchange Rate is the price of one currency expressed in terms of another currency. For example, if 1 USD = ₹83, then ₹83 is the exchange rate of the US dollar in terms of Indian Rupees.

Exchange rates matter enormously: they affect the cost of imports, the competitiveness of exports, inflation, and the balance of payments.

Fixed Exchange Rate System

Under the Fixed Exchange Rate system, the exchange rate is officially set and maintained by the government or central bank. The rate is kept constant (or within a narrow band) regardless of market forces.

Advantages:

Disadvantages:

Flexible (Floating) Exchange Rate System

Under the Flexible Exchange Rate system, the exchange rate is determined entirely by the market forces of demand and supply of foreign currency. The government does not intervene.

Advantages:

Disadvantages:

Managed Float (Dirty Float)

In practice, most countries including India operate a managed float — the exchange rate is largely market-determined, but the central bank (RBI in India) intervenes periodically to prevent excessive volatility or to achieve specific exchange rate targets.

Demand for Foreign Exchange

Demand for foreign exchange arises when Indian residents need to make payments to foreign entities. The demand curve for foreign exchange slopes downward — when foreign currency is cheaper (rupee is stronger), Indians buy more foreign goods and services.

Sources of demand for forex (outflows from India):

Supply of Foreign Exchange

Supply of foreign exchange arises when foreign entities make payments to Indian residents. The supply curve of foreign exchange slopes upward.

Sources of supply of forex (inflows into India):

Depreciation vs Devaluation (and Appreciation vs Revaluation)

Term System Direction Decided By Effect
Depreciation Flexible (floating) Rupee falls in value Market forces Exports cheaper; imports costlier
Devaluation Fixed Rupee falls in value Government / RBI Exports cheaper; imports costlier
Appreciation Flexible (floating) Rupee rises in value Market forces Exports costlier; imports cheaper
Revaluation Fixed Rupee rises in value Government / RBI Exports costlier; imports cheaper

The key exam distinction: depreciation/appreciation are market-driven (flexible rate); devaluation/revaluation are policy-driven (fixed rate).

Purchasing Power Parity (PPP) Theory

The Purchasing Power Parity theory states that the exchange rate between two currencies should equal the ratio of the price levels in the two countries. It explains long-run exchange rate movements.

Exchange Rate (e) = P_domestic / P_foreign

If the price level in India rises faster than in the USA (India has higher inflation), the rupee should depreciate against the dollar to maintain PPP. This is the purchasing power parity condition.

Limitation: PPP holds only in the long run and only for tradeable goods. Non-tradeable goods (haircuts, rent) cause deviations from PPP.

Key Concepts at a Glance

Fixed vs Flexible Rate
Government-set vs Market-determined Fixed: set by govt/central bank; requires forex reserves to maintain. Flexible: determined by market forces of demand and supply of foreign currency.
Depreciation vs Devaluation
Market-driven vs Policy-driven fall in value Depreciation: market-driven fall in a currency's value (flexible rate). Devaluation: govt-decided reduction in currency value (fixed rate). Both make exports cheaper and imports costlier.
Demand for Forex
Imports, investment abroad, tourism, education Imports, investment abroad, paying interest on external debt, tourism, foreign education. Demand curve slopes downward — cheaper forex leads to more imports.
PPP Theory
e = P_domestic / P_foreign Exchange rate between two currencies should equal the ratio of price levels. Explains long-run exchange rate movements. Higher domestic inflation → currency depreciation.

Sample MCQs — Foreign Exchange Rate

1. Depreciation of the rupee means:
  1. RBI reduces the value of rupee
  2. Market forces reduce rupee's value
  3. Rupee becomes stronger
  4. India's imports become cheaper
Correct: B — Depreciation is a market-driven fall in a currency's value under the flexible exchange rate system. When RBI officially reduces the value, it is called devaluation.
2. Which of the following creates demand for foreign exchange?
  1. Exports of goods
  2. Foreign tourists visiting India
  3. Foreign direct investment into India
  4. Paying for imports
Correct: D — Paying for imports requires purchasing foreign currency, creating demand for forex. Exports, foreign tourism receipts, and FDI inflows all supply foreign exchange to India.
3. (Numerical) Exchange rate: 1 USD = ₹70. India imports goods worth $100. After the rupee depreciates to 1 USD = ₹80, what is the cost of the same import in rupees?
  1. ₹7,000
  2. ₹8,000
  3. ₹700
  4. ₹6,000
Correct: B — After depreciation: Cost = $100 × ₹80/$ = ₹8,000. Before depreciation it was ₹7,000. Depreciation makes imports costlier for domestic buyers.
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