Boosting public investment will have the following impacts:
Income: Increased investment leads to higher aggregate demand, generating income for contractors, suppliers, and workers involved in the project.
Employment: Public investments create direct and indirect employment opportunities, reducing unemployment.
Output: The multiplier effect ensures that the initial investment leads to multiple rounds of increased production and services in the economy. Thus, public investments have a positive impact on income, employment, and output, promoting economic growth.
A battery of emf \( E \) and internal resistance \( r \) is connected to a rheostat. When a current of 2A is drawn from the battery, the potential difference across the rheostat is 5V. The potential difference becomes 4V when a current of 4A is drawn from the battery. Calculate the value of \( E \) and \( r \).