Q1PhysicsUnit 12: Current Electricity
Fuse wire should be placed in the path
of wire
Physics · JEE
Online Practice: Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel for JEE
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Syllabus context
Part of Current Electricity in JEE Main Physics.
- Electric current: drift velocity, mobility and their relation with electric current
- Ohm's law, electrical resistance, I-V characteristics of Ohmic and non-ohmic conductors
- Electrical energy and power, electrical resistivity and conductivity
- Series and parallel combinations of resistors, temperature dependence of resistance
- Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel
- Kirchhoff's laws and their applications, Wheatstone bridge, Metre Bridge
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Q2PhysicsUnit 12: Current Electricity
There are a large number of cells available, each marked to be used to supply current to a device of resistance requiring current. How should the cells be
arranged, so that power is transmitted to the load using minimum number of
cells?
Q3PhysicsUnit 12: Current Electricity
A current of ampere flows through a resistance when connected across a
cell of emf and internal resistance
When is increased by , the
current through the circuit is The
value of is :
Q4PhysicsUnit 12: Current Electricity
In potentiometer experiment, null point
is obtained at a particular point for a cell on potentiometer wire cm long. If the length of the potentiometer wire is increased without changing the cell, the balancing length will (Driving source is not changed)
Q5PhysicsUnit 12: Current Electricity
If the switch at point is opened
(shown in the figure) choose the correct
option
Q6PhysicsUnit 12: Current Electricity
A battery of emf and internal resistance of 0.5 ohms is connected
across variable resistance R.The
maximum value of is given by:
Q7PhysicsUnit 12: Current Electricity
A galvanometer in a circuit:
Q8PhysicsUnit 12: Current Electricity
A battery has six cells in series and each cell has an electromagnetic force and internal resistance If
an external load of resistance is
connected to it. The potential drop across the load is
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Popular questions in Internal resistance, potential difference and emf of a cell, a combination of cells in series and parallel
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