Multiple choice general knowledge

The energy used by the brain is enough to light a ___ watt light bulb.

  1. 150

  2. 100

  3. 75

  4. 25

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The human brain uses approximately 20 watts of power, comparable to a dim 25-watt light bulb. This is remarkably efficient given its complex processing. While the brain is only 2% of body weight, it consumes 20% of the body's energy. Options A, B, and C overestimate its power consumption.