What are the effects of tariffs and export subsidies on the exchange rate?

Tariffs and export subsidies create differences between the prices at which goods are traded internationally (external prices) and the prices at which they are traded within a country (internal prices).
The direct effect of a tariff is to make imported goods more expensive within a country than outside.
An export subsidy offers producers an incentive to export, making it more profitable to sell abroad than in the domestic market, unless the domestic price is higher.