Question
Define resonance. Explain resonant frequency and write characteristics of resonant circuit.

Answer

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A system has two charges $\mathrm{q}_{\mathrm{A}}=2.5 \times 10^{-7} \mathrm{C}$ and $\mathrm{q}_{\mathrm{B}}=-2.5 \times 10^{-7} \mathrm{C}$ located at points $\mathrm{A}:(0,0,-15 \mathrm{~cm})$ and $\mathrm{B}:(0,0,+15 \mathrm{~cm})$, respectively. What are the total charge and electric dipole moment of the system?
Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver $R_1$ and $R_2$ are at great but equal distaces from B.
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  2. Which of the two receivers picks up the larger signal when B is turned off?
  3. Which of the two receivers picks up the larger signal when D is turned off?
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The deuteron is bound by nuclear forces just as H-atom is made up of p and e bound by electrostatic forces. If we consider the force between neutron and proton in deuteron as given in the form of a Coulomb potential but with an effective charge e':
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