M Dash Foundation: C Cube Learning

Category: manmohan dash

  • Class XII, ICSE exam questions, Physics, Updated Version 2

    Question 6 [2+3+2] Obtain an expression for the Nuclear Size of an atom by solving for distance of closest approach (r) which is also known as Impact Parameter (say l). Use an incoming alpha-particle of mass mα and charge q that’s deflected by the presence of a nucleus of atomic number Z to obtain l.…

  • Class XII, CBSE exam questions, Physics

    Electrostatics 6. State how density of electric lines of force is related to the Electric Field Vector intensity E. Also mention another three properties of the lines of forces. 7. Write the vector expression for Coulomb’s law and state 3 forces that are conservative forces by nature. 8. What happens to the charge on a…

  • Class XII, ICSE exam questions, Physics.

    Question 1 (a) In an electric dipole, how is the direction of the dipole vector defined? (b) What’s the Electric Potential of a Dipole Vector in the vertical direction to it? (c) Say if this is correct or incorrect: “Between an alpha-particle and a proton the alpha particle has more electrostatics potential energy in an…

  • Can Neutrinos produce sound? Scream like Fox?

    Response: Neutrinos vibrate, YES. Much like anything else, since they have energy. But they do not vibrate at any particular frequency since their energy is not fixed. Their energy can vary widely and that makes them vibrate at different frequencies. Its worthwhile to mention that its not this frequency or oscillation which we were originally…

  • Exoplanet Lifes? The aliens could be debating to come or not. Thou shall not panic.

    Query: “In the search for intelligent life SETI should limit its search to star systems 100 light years or less?” Response: In search of anything there should not be preconceived limits imposed a priori considering them important one way or the other? query: “I would not be surprised if we are being visited from star…