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across the variable resistor and the current 
in the variable resistor?
and the terminal potential difference (p.d.) across the cell change?
and 
of closing the switch?
and internal resistance 
connected to a resistor of resistance 
. The current in the circuit is 
.
and negligible internal resistance are connected in series, as shown.
and internal resistance 
is connected to a variable resistor, a voltmeter, and an ammeter, as shown. The resistance of the variable resistor is varied. The reading on the ammeter 
and the reading on the voltmeter 
are recorded.
and internal resistance 
is connected to three resistors of resistances 
, 
and 
, as shown. A current of 
is in the resistor of resistance 
is in the resistor of resistance 
and internal resistance 
connected across a lamp. The lamp has a resistance of 
.
when it is connected across the terminals of a battery.
is connected in parallel with the battery, the voltmeter reading changes to 
.
. The cell is connected in series with an ammeter and a variable resistor of resistance 
.
the ammeter reads 
. When 
the ammeter reads 
. What is the value of 
, are connected together, as shown.
. What does this mean?
of energy in the internal resistance of the cell.
