General
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Physics

An ant goes from P to Q on a circular path in 20 second Radius OP=10 m . What is the average speed and average velocity of it ?

PhysicsGeneral

  1. straight pi over 3 ms-1, square root of 3 ms-1
  2. πms to the power of negative 1 end exponent comma square root of 6 space end root ms to the power of negative 1 end exponent
  3. straight pi over 3 ms-1square root of 3 ms-1
  4. straight pi over 6 ms-1fraction numerator square root of 3 over denominator 2 end fraction ms-1

    Answer:The correct answer is: straight pi over 3 ms-1square root of 3 ms-1

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    If f colon R not stretchy rightwards arrow left parenthesis 0 comma 1 right square bracket defined by f left parenthesis x right parenthesis equals fraction numerator 1 over denominator x squared plus 1 end fraction comma text  then  end text f text  is  end text

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    The variation of intensity of magnetization left parenthesis I right parenthesis with respect to the magnetizing field (H) in a diamagnetic substance is described by the graph in figure.

    For a dia-magnetic substance, I is negative and negative I proportional to H. Therefore, the variation is represented by O C o r O D. As magnetisation is small, O C is better choice.

    The variation of intensity of magnetization left parenthesis I right parenthesis with respect to the magnetizing field (H) in a diamagnetic substance is described by the graph in figure.

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    For a dia-magnetic substance, I is negative and negative I proportional to H. Therefore, the variation is represented by O C o r O D. As magnetisation is small, O C is better choice.
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    The graph of position not stretchy rightwards arrow time shown in the figure for a particle is not possible because ....

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    Curie-Weiss law is obeyed by iron

    Iron is a ferromagnetic substance and ferromagnetic substance obeys Curie-Weiss law above its Curie temperature.

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    Iron is a ferromagnetic substance and ferromagnetic substance obeys Curie-Weiss law above its Curie temperature.
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    If the B minus H curves of two samples of P and Q of iron are as shown below, then which one of the following statements is correct?

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    Diamagnetic materials have negative susceptibility. Thus, (c) is wrongly stated.
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    The magnetic susceptibility of a paramagnetic substance at negative 73 degree C is 0.0060, then its value atnegative 173 degreeC will be

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    fraction numerator X subscript 2 end subscript over denominator 0.0060 end fraction equals fraction numerator 273 minus 73 over denominator 273 minus 173 end fraction equals fraction numerator 200 over denominator 100 end fraction equals 2
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    X subscript m end subscript proportional to fraction numerator 1 over denominator T end fraction comma Therefore,
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    fraction numerator X subscript 2 end subscript over denominator 0.0060 end fraction equals fraction numerator 273 minus 73 over denominator 273 minus 173 end fraction equals fraction numerator 200 over denominator 100 end fraction equals 2
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    Magnetic substance when kept in a magnetic field is feebly repelled or thrown out if the substance is diamagnetic.
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    Curie temperature is the one above which

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    Curie temperature is the one above which

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    Which of the following is represented by the area enclosed by a hysteresis loop (B-H curve)?

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    Which of the following is represented by the area enclosed by a hysteresis loop (B-H curve)?

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    Area enclosed by B minus H curve represents energy lost. If the area of hysteresis loop is less energy loss is low whereas if the area of hysteresis loop is large energy loss is high.
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    For a paramagnetic material, the dependence of the magnetic susceptibility X on the absolute temperature is given as

    For paramagnetic materials, the magnetic susceptibility gives information on the molecular dipole moment and hence on the electronic structure of the molecules in the material. The paramagnetic contribution to the molar magnetic susceptibility of a material, X is related to the molecular magnetic moment Mby the Curie relation
    X equals c o n s t a n t cross times fraction numerator M over denominator T end fraction ⟹ X proportional to fraction numerator 1 over denominator T end fraction

    For a paramagnetic material, the dependence of the magnetic susceptibility X on the absolute temperature is given as

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    For paramagnetic materials, the magnetic susceptibility gives information on the molecular dipole moment and hence on the electronic structure of the molecules in the material. The paramagnetic contribution to the molar magnetic susceptibility of a material, X is related to the molecular magnetic moment Mby the Curie relation
    X equals c o n s t a n t cross times fraction numerator M over denominator T end fraction ⟹ X proportional to fraction numerator 1 over denominator T end fraction