An inventor claims to have built a device that draws heat only from a single…
PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics
Problem
An inventor claims to have built a device that draws heat only from a single reservoir at 400 K and delivers an equal amount of work in every cycle without rejecting any heat. This device is best classified as:
(a) a perpetual-motion machine of the first kind
(b) an ideal Carnot engine with 100% efficiency
(c) a perpetual-motion machine of the second kind
(d) not a perpetual-motion machine at all