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DSSSB TGT C9powermachines — practice questions

Explore 7 free C9powermachines questions in DSSSB TGT Physics. Open each question or exercise to read its content, reference answers and available explanation.

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C9powermachines questions and exercises with answers

Showing questions 1–7 of 7.

As per your syllabus, Science, POWER is defined as which quantity?Read the answer and worked solution →As per your syllabus, what is the SI unit of POWER?Read the answer and worked solution →As per your syllabus, after whom is the SI unit of POWER (watt) named?Read the answer and worked solution →As per your syllabus, 1 HORSEPOWER (hp) is approximately equal to how many watts?Read the answer and worked solution →As per your syllabus, a weightlifter lifts a 75 kg mass by 2 m in 5 seconds (taking g = 10 m/s²). What POWER does she require?Read the answer and worked solution →As per your syllabus, what is the mechanical advantage of a FIXED PULLEY?Read the answer and worked solution →As per your syllabus, a LEVER consists of three parts. Which is NOT one of them?Read the answer and worked solution →

Worked practice questions

As per your syllabus, Science, POWER is defined as which quantity?

  1. The rate at which work is done — work divided by time
  2. The total energy stored
  3. The total work done
  4. The force applied
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Correct answer: A. The rate at which work is done — work divided by time

As per your syllabus, Eq. 7.11, P = W / t. The other options confuse power with work, energy, or force.

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As per your syllabus, what is the SI unit of POWER?

  1. Joule (J)
  2. Pascal (Pa)
  3. Newton (N)
  4. Watt (W) — 1 W = 1 J/s
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Correct answer: D. Watt (W) — 1 W = 1 J/s

As per your syllabus, SI unit of power = watt = joule per second. Joule is energy/work; newton is force; pascal is pressure.

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As per your syllabus, after whom is the SI unit of POWER (watt) named?

  1. James Prescott Joule
  2. Isaac Newton
  3. James Watt — inventor of an efficient steam engine
  4. Albert Einstein
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Correct answer: C. James Watt — inventor of an efficient steam engine

As per your syllabus, 'Meet a Scientist' (Ch 7), watt is named after James Watt. Joule named the joule Newton named the newton Einstein didn't have an SI unit named after him.

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