Physics Circular Motion and Gyration Quiz
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Questions and Answers

In which scenario will the magnetic dipole moments be effectively aligned parallel to the field?

  • When the temperature is very low (correct)
  • When the temperature is very high
  • When the external field is very large
  • When the external field is very small

    • What condition leads to the magnetization reaching saturation?

  • Low external field
  • High temperature
  • Low temperature
  • High external field (correct)

    • What is the displacement of a particle located 50 cm from the origin in a simple harmonic wave after 0.1 second?

  • 2.5 cm
  • 1.732 cm
  • 3.464 cm (correct)
  • 4.2 cm

    • What is the velocity of a particle located 50 cm from the origin after 0.1 second in a simple harmonic wave?

    <p>+100 cm/s</p> Signup and view all the answers

    When an electron is accelerated through 86 V and enters a region of uniform magnetic induction, what can affect its maximum magnetic force?

    <p>Magnitude of the uniform magnetic induction</p> Signup and view all the answers

    What does it mean when the magnetization reaches saturation?

    <p>It stops responding to changes in external field</p> Signup and view all the answers

    What is the principle of a potentiometer?

    <p>The potential difference across a potentiometer wire is directly proportional to the length.</p> Signup and view all the answers

    What happens when the positive terminals of two cells are connected to the high potential terminal of a potentiometer?

    <p>A potential gradient is set up along the potentiometer wire.</p> Signup and view all the answers

    In the context of a potentiometer, what does the negative terminal of a cell connect to?

    <p>A galvanometer</p> Signup and view all the answers

    How does the potentiometer help in comparing the emfs of two cells?

    <p>By setting up a potential gradient along its wire</p> Signup and view all the answers

    What happens when the negative terminal of cells are connected through the galvanometer?

    <p>The galvanometer deflects indicating a difference in emfs.</p> Signup and view all the answers

    Why is a pencil jockey used in a potentiometer setup with cells?

    <p>To make precise contact on the wire for measurements.</p> Signup and view all the answers

    What is the difference in the tensions in the string of a bob in vertical circular motion at a horizontal position and the uppermost position?

    <p>3 mg</p> Signup and view all the answers

    If the radius of gyration of a uniform disc about its central transverse axis is 2.5 units, what must be its radius of gyration about a tangent in its plane?

    <p>$2ef2.5$</p> Signup and view all the answers

    Which of the following cases does the principle of conservation of angular momentum apply to?

    <p>For both a planet revolving in an elliptical orbit and a planet revolving in a circular orbit</p> Signup and view all the answers

    In a conical pendulum of string length L, how is the angular speed related?

    <p>$1/efL$</p> Signup and view all the answers

    For a rolling hollow sphere, what is the ratio of translational KE to rotational KE to total KE?

    <p>3 : 2 : 5</p> Signup and view all the answers

    What is the maximum mass that a hydraulic lift is designed to lift?

    <p>2000 kg</p> Signup and view all the answers

    What is the equation of a simple harmonic progressive wave on a string with an amplitude of 8 cm?

    <p>y = 8 sin (0.02x - 4t) cm</p> Signup and view all the answers

    If an air column in a pipe closed at one end vibrates with three nodes formed in it, how many times is the frequency of its vibrations compared to the fundamental frequency?

    <p>4 times</p> Signup and view all the answers

    In a resonance tube, if oil of higher density than water is used, what happens to the resonance frequency?

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

    If the tension in a piano wire is increased by 25%, what happens to its frequency?

    <p>Increases by 12%</p> Signup and view all the answers

    What happens when two sound waves of wavelengths 170 m and 222 m beat at 4 per second in air when arriving at a point simultaneously?

    <p>Destructive interference</p> Signup and view all the answers

    What is the maximum kinetic energy (KEmax) when m = 1.4 kg and A = 6 cm?

    <p>$(3.36 \times 10^{-2})$ J</p> Signup and view all the answers

    What is the equivalent resistance between points A and B in the given circuit?

    <p>2$ ext{ } ext{ } ext{ } ext{ } ext{ } ext{ } ext{ } ext{ } ext{ } ext{ } ext{ }$R</p> Signup and view all the answers

    If a quarter of the circumference of the loop has resistance X, what is the equivalent resistance between points P and Q?

    <p>7.5$ ext{ }$$ ext{ } ext{ }$$ ext{ } ext{ }$$ ext{ }$Ω</p> Signup and view all the answers

    In the circuit where each half of the metal ring has resistance X, what is the total resistance of the metal ring?

    <p>$4X$</p> Signup and view all the answers

    What is the magnetic field B at the center of curvature C of the semicircle conductor carrying a current I?

    <p>$μ_0 I / (2πR)$</p> Signup and view all the answers

    If the resistance of each half of the metal ring is X, what is the resistance in the left gap of length 20 cm?

    <p>$X/2$</p> Signup and view all the answers

    What are the roots of the equation 2R$^2 - 3R + 1 = 0$?

    <p>$R = 1, R = 0.5$</p> Signup and view all the answers

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