Question
Write the important points for series connection of cells.
✓
Answer
→When the current leaves each cell from the positive terminal then :
(1) The equivalent emf of a series combination of $n$ cells is just the sum of their individual emfs.
(2) The equivalent internal resistance of a series combination of $n$ cells is just the sum of their individual internal resistances.
(3) In this type of combination, if the current leaves the cell from negative terminal then to obtain equivalent emf, the emf of that cell is taken negative.
(1) The equivalent emf of a series combination of $n$ cells is just the sum of their individual emfs.
(2) The equivalent internal resistance of a series combination of $n$ cells is just the sum of their individual internal resistances.
(3) In this type of combination, if the current leaves the cell from negative terminal then to obtain equivalent emf, the emf of that cell is taken negative.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
State the right hand thumb rule for finding the direction of the magnetic field due to a current carrying circular loop.
A ray PQ incident normally on the refracting face BA is refracting in the prism BAC made of material of refractive index1.5. Complete the path of ray through the prism. From which face will the ray emerge? Justify your answer.
The following figure shows the input waveforms (A, ,B) and the output waveform (Y) of a gate. Identify the gate, write its truth table and draw its logic symbol.
Explain the unit of mass.
N small conducting liquid droplets, each of radius r, are charged to a potential V each. These droplets coalesce to form a single large drop without any charge leakage. Find the potential of the large drop.
Two metallic wires P and Q of the same material and same length but different cross-sectional areas A1 and A2 are joined together and then connected to a source of emf. Find the ratio of the drift velocities of free electrons in the wires P and Q, if the wires are connected (i) in series, and (ii) in parallel.
A smooth block loosely fits in a circular tube placed on a horizontal surface. The block moves in a uniform circular motion along the tube (figure). Which wall (inner or outer) will exert a nonzero normal contact force on the block?
Explain the dependence of the electric potential generated at a great distance due to a small electric dipole, when the point of observation is (i) in the axial position, and (ii) in the equatorial position.
A mosquito net over a 7ft × 4ft bed is 3ft high. The net has a hole at one corner of the bed through which a mosquito enters the net. It flies and sits at the diagonally opposite upper corner of the net.
- Find the magnitude of the displacement of the mosquito.
- Taking the hole as the origin, the length of the bed as the X-axis, its width as the Y-axis, and vertically up as the Z-axis, write the components of the displacement vector.
A dbuteron and an alpha particle are accelerated with the same accelerating potential. Which one of the two has:
- Greater value of de-Broglie wavelength, associated with it and
- Less kinetic energy? Explain.