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Ensure that you
understand Ohms Law
before tackling this,
In the diagram the total
series resistance = 30
ohms.
The current flowing is
30 volts/30 ohms = 1
amp.
Thus the current through
the 5 ohm resistor is 1
amp.
Therefore the voltage
across the 5 ohm is 1
amp x 5 ohm = 5 volts.
Similarly the voltage
across R2 is 10 volts.
The voltage across R3 is
15 volts.
If you add these three
voltages 5 + 10 + 15 =
30 volts.
This is the same as the
battery voltage.
Add up both sets of
voltage in the
transistor circuit
diagram.
They both add up to 10
volts , which is the
battery voltage.
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