The first law of thermodynamics states that whereas energy can be __________ from one form into another, it cannot be created or destroyed.
- (a)reduced
- (b)induced
- (c)performed
- (d)transformed
Correct — D, 'transformed'. The frame 'from one form into another' calls for a verb of conversion, and to transform energy is to change it from one form into another, which is what the first law of thermodynamics says. The rest of the sentence rules out creation and destruction, leaving change of form as the only thing the verb can be describing.
- (a)reduced — To reduce is to make smaller in amount. It does not fit 'from one form into another', and it would contradict the conservation of energy.
- (b)induced — To induce is to bring something about. It names the causing of an effect, not a change of one form into another.
- (c)performed — Work is performed; energy is not, so the verb does not take 'energy' as its object in this sense.
The blank is fixed by the frame 'from one form into another', which only a verb of conversion can complete.
The physics is a bonus rather than a requirement here. The preposition pair 'from … into' is the real clue, and it would decide the sentence just as well if the topic were currency or language.
- The first law of thermodynamics states that energy is conserved — it changes form but is neither created nor destroyed.
- Picking a science-sounding word such as 'induced' without checking the preposition frame.
- Ignoring the second clause, which rules out any verb implying loss or gain of energy.
Asked as a fill-in-the-blank item — choose the word that completes the sentence.
No directly related past PYQ was found.
- practice — not a real PYQ
Choose the word that best completes the sentence. A generator __________ mechanical energy into electrical energy.
- (a)reduces
- (b)induces
- (c)transforms
- (d)performs
Answer(c) transforms — the frame 'from … into' calls for a verb of conversion.
- practice — not a real PYQ
Choose the word that best completes the sentence. A changing magnetic field __________ a current in the coil.
- (a)transforms
- (b)reduces
- (c)performs
- (d)induces
Answer(d) induces — to induce is to bring an effect about.