PDF Notes: marathone 01

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    What is the dimensional formula for electric potential?

    The dimensional formula for electric potential (voltage) is given by $$ML^2T^{-3}I^{-1}$$.

    What is the unit of electromotive force (emf)?

    The unit of electromotive force (emf) is $$\frac{Nm}{C}$$ or $$\frac{NM}{C}$$.

    What is the unit of capacitance?

    The unit of capacitance is the farad (F).

    Who introduced the concept of electromotive force?

    The concept of electromotive force (emf) was introduced by Michael Faraday.

    Which of the following is not an ohmic example?

    A capacitor is not an ohmic example, as it does not follow Ohm's law.

    What is the direction of electric current flow?

    The direction of electric current flow is opposite to the flow of electrons.

    What does 1 farad represent in terms of charge?

    1 farad is equivalent to 1 coulomb per volt (1 F = 1 C/V).

    Which mixed unit is not equivalent to watts?

    The unit $$\Omega^2/Volt$$ is not equivalent to watts.

    If a wire with a resistance of 10Ω is stretched to double its length and halved in cross-sectional area, what will be the new resistance?

    The new resistance will remain 10Ω.

    What is the equivalent resistance between points P and Q in a given circuit?

    The equivalent resistance between points P and Q is 4Ω.

    What is the dimensional formula for the spring constant (k)?

    The dimensional formula for the spring constant (k) is $$MT^{-2}$$.

    What is the SI unit of entropy?

    The SI unit of entropy is joules per kelvin (JK⁻¹).

    What is the unit of electric flux?

    The unit of electric flux is Newton-meter² per coulomb (N·m²/C).

    What is the equivalent resistance of a balanced wire bent into an equilateral triangle?

    The equivalent resistance of a balanced wire bent into an equilateral triangle is $$\frac{2}{3}$$ Ω.

    What is the current through a resistor R₃ in a given circuit with a 10V battery?

    The current through resistor R₃ is 0.5A.

    What is the equivalent resistance of a 27Ω wire bent into an equilateral triangle?

    The equivalent resistance of a 27Ω wire bent into an equilateral triangle is 6Ω.

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

    The equivalent resistance between points A and B is 2.5Ω.

    What is the equivalent resistance between points L and M in a given circuit?

    The equivalent resistance between points L and M is 20Ω.

    What is the unit of gravitational force?

    The unit of gravitational force is Newton (N).

    What is the distance equivalent to one light year?

    One light year is equivalent to approximately 9.46 × 10¹² kilometers.

    Who discovered quantum theory?

    Quantum theory was discovered by Max Planck.

    Which of the following is not a unit of mass?

    MeV (mega-electronvolts) is not a unit of mass.

    What is the unit of X-rays?

    The unit of X-rays is the roentgen.

    What is the equivalent of 1 curie in terms of radioactivity?

    1 curie is equivalent to $$3.7 × 10^{10} Bq$$ (becquerels).

    What are the units of the Poynting vector?

    The units of the Poynting vector are $$JS^{-1}m^{-2}$$.