Question

hydroelectric power can be generated in several ways. common methods include building large dams and reservoirs, using microhydropower generators, and using tidal energy generators.
which of the following are disadvantages of using tidal energy to generate electricity?
choose 2 answers:
a tidal energy is a new technology and lacks cost - effectiveness.
b tidal energy can protect coastal areas from flooding.
c tidal energy is an intermittent energy source.
d tidal energy is predictable and developed from well - known cycles.

Explanation:

• Option A: Tidal energy technology is relatively new, and the infrastructure and development costs are high, so it lacks cost - effectiveness. This is a disadvantage.
• Option B: Protecting coastal areas from flooding is an advantage, not a disadvantage.
• Option C: Tidal energy depends on the tides, which occur at specific times, so it is intermittent (not available continuously), which is a disadvantage.
• Option D: Being predictable from known cycles is an advantage as it helps in planning power generation.

Answer:

A. Tidal energy is a new technology and lacks cost - effectiveness.
C. Tidal energy is an intermittent energy source.