Physics: STD.XII Chapter 10 NAVNEET 21 M.L.Q.SETS Quiz
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Questions and Answers

What does a phasor represent?

  • A quantity that varies sinusoidally with time (correct)
  • A quantity that varies linearly with time
  • A quantity that varies exponentially with time
  • A quantity that remains constant with time

    • Why is a blackbody referred to as a full radiator?

  • It emits radiation only in the visible spectrum
  • It absorbs radiation from the environment
  • It emits radiation covering the entire electromagnetic spectrum (correct)
  • It emits radiation in a limited range of frequencies

    • What is the function of a NAND logic gate?

  • Outputs LOW if all inputs are HIGH
  • Outputs LOW if any input is HIGH (correct)
  • Outputs HIGH if all inputs are LOW
  • Outputs HIGH if any input is HIGH

    • How is a hydraulic lift powered?

    <p>By applying hydraulic pressure on oil-filled cylinders</p> Signup and view all the answers

    In simple harmonic motion, what does the total energy of a particle depend on?

    <p>Acceleration and mass</p> Signup and view all the answers

    What does the half-life of a radioactive element signify?

    <p>The time taken for 50% of the nuclei to disintegrate</p> Signup and view all the answers

    What property of a quantity does a phasor represent?

    <p>Sinusoidal variation with time</p> Signup and view all the answers

    Why is a blackbody known as a full radiator?

    <p>It covers the entire electromagnetic spectrum</p> Signup and view all the answers

    What is the output of a NAND logic gate when all inputs are HIGH?

    <p>LOW</p> Signup and view all the answers

    How is a hydraulic lift able to lift heavy objects?

    <p>By transmitting pressure through oil-filled cylinders</p> Signup and view all the answers

    What is the expression for the total energy of Simple Harmonic Motion (SHM) in terms of acceleration?

    <p>$E = \frac{1}{2} m\omega^2 A^2$</p> Signup and view all the answers

    If the half-life of a radioactive element is 100 days, how long will it take for 87.5% of the initial nuclei to decay?

    <p>175 days</p> Signup and view all the answers

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