An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
In this scenario, an electric device with a current of 15.0 A for 30 seconds results in a total charge of 450 C. Since the charge of a single electron is about 1.6 × 1 0 − 19 C, approximately 2.81 × 1 0 21 electrons flow through the device in that time. Therefore, the total flow of electrons is about 2.81 sextillion electrons.
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The correct statement about a contractionary monetary policy is (C) When the central bank wants to lower money supply and increase interest rates.
Explanation :
What is Contractionary Monetary Policy?
Contractionary monetary policy is a type of monetary policy that is used by the central bank to reduce the money supply and curb excessive inflation.
Its main goal is to slow down the economy by making borrowing more expensive and reducing consumer spending.
How it works:
Decrease Money Supply : The central bank takes actions to lower the amount of money in circulation. This can be done by selling government securities, increasing reserve requirements for banks, or through other measures that restrict the money supply.
Increase Interest Rates : By reducing the money supply, the central bank causes interest rates to rise. Higher interest rates make borrowing more expensive for businesses and consumers, leading to a decrease in spending and investment.
Why it is used:
This policy is typically used to combat inflation, which occurs when prices rise too quickly. By increasing interest rates and reducing the money supply, demand for goods and services is lowered, which can help bring prices down.
Impact on Economy:
A contractionary policy can lead to slower economic growth in the short term. It may also lead to higher unemployment as businesses reduce expansion plans. However, it is a necessary tool to prevent runaway inflation, which can have severe negative effects on the economy.
In summary, contractionary monetary policy aims to reduce the money supply and increase interest rates, making option (C) the correct answer.
