Question
Calculate the current drawn from the battery in the given network shown here. State Kirchhoff’s loop law and name the law on which it is based.

Answer

The equivalent circuit is as shown in figure alongside.

[$\therefore$ Bridge is in balanced condition, no current flows through $5\Omega$ resistance]

$\frac{1}{\text{R}}=\frac{1}{5}+\frac15\text{R}=5\Omega$

Current in the circuit $=\frac{6}{2.5}\text{A}=2.4\text{A}$

Kirchhoff’s Loop Law: The algebraic sum of potential differences of different circuit elements of a closed circuit (or mesh) is zero. This law is based on law of conservation of energy.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

  1. Why photoelectric effect can not be explained on the basis of wave nature of light? Give reasons.
  2. Write the basic features of photon picture of electromagnetic radiation on which Einstein’s photoelectric equation is based.
For a system made of two very long coaxial solenoids, explain mutual inductance. Prove $M _{12}= M _{21}= M$ (Reciprocity Theorem).
A long, vertical wire carrying a current of 10A in the upward direction is placed in a region where a horizontal magnetic field of magnitude 2·0 × 10-3T exists from south to north. Find the point where the resultant magnetic field is zero.
Two small balls A and B, each of mass m, are joined rigidly by a light horizontal rod of length L. The rod is clamped at the centre in such a way that it can rotate freely about a vertical axis through its centre. The system is rotated with an angular speed w about the axis. A particle P of mass m kept at rest sticks to the ball A as the ball collides with it. Find the new angular speed of the rod.
Is it easier to take out a nucleon from carbon or from iron? Fi-om iron or from lead?
Find the binding energy per nucleon of $\text{ }^{197}_{79}\text{Au}$ if its atomic mass is 196.96u.
The numerical value of ionization energy in eV equals the ionization potential in volts. Does the equality hold if these quantities are measured in some other units?
Draw a schematic arrangement of the Geiger - Marsden experiment. How did the scattering of $\alpha-$ particles by a thin foil of gold provide an important way to determine an upper limit on the size of the nucleus? Explain briefly.
A hollow charged conductor has a tiny hole cut into its surface. Show that the electric field in the hole is (σ/2ε0) $\hat{\text{n}}$ , where $\hat{\text{n}}$ is the unit vector in the outward normal direction, and σ is the surface charge density near the hole.
A semi-circular arc of radius 20cm carries a current of 10A. Calculate the magnitude of magnetic field at the centre of the arc.