In a Compressed Air Energy Storage (CAES) system, which energy transformation occurs during the stage when the stored energy is converted back into electricity?

Why do power grids utilize pumped hydroelectric storage despite the inherent energy losses involved in the pumping process?

An ideal step-up transformer at a power station is used to prepare electricity for long-distance transmission. The transformer receives $60\ \text{MW}$ of electrical power from the generator at a primary voltage of $12\ \text{kV}$ . The voltage is then increased to $300\ \text{kV}$ for the transmission cables. What is the current flowing in the transmission cables?

MYP MYP Physics Topic Generation and Transmission of Electricity Questionbank

Practice MYP MYP Physics Topic Generation and Transmission of Electricity with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for Generation and Transmission of Electricity and mirrors Paper 1, 2 style where relevant.

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True

False

Electrical energy $\rightarrow$ Potential energy

Chemical energy $\rightarrow$ Nuclear energy

Potential energy $\rightarrow$ Kinetic energy $\rightarrow$ Electrical energy

Solar energy $\rightarrow$ Chemical energy

To convert electrical energy into nuclear energy

To eliminate the need for transmission cables

To balance electricity supply with varying consumer demand

To increase the total amount of energy available on Earth

$0.005\ \text{A}$

$5000\ \text{A}$

$200\ \text{A}$

$1.8\times 10^{13}\ \text{A}$