A constant current supply and a constant voltage supply are both adjusted so tha

Question

A constant current supply and a constant voltage supply are both adjusted so that either one will light a particular brand of light bulb equally brightly. Now, a set of identical bulbs is put together in the arrangement below 9. Which power supply (without any readjustments) makes the arrangement brighter, constant current, or constant voltage? Explain. c. Power Supply d. Is the current flow distribution (i.e. ratio of current through top pair of bulbs to the current through the single bottom one) dependent on which type of power supply is used?

Explanation / Answer

c- VOLTAGE SOURCE WILL MAKE MORE BRIGHT.

Since for a single bulb both provide equal brightness which means that the current supplied by the voltage source to single bulb is equal to current by current source.

Now let voltage = V

So for one single bulb resistance is R

So I =V/R

Now according to arrangement total resistance = 2R×R / 2R+R

= 0.66666667 R

So current when voltage source is used is

I1 = V/0.66666667R

I1 = 1.5 V/R

I1= 1.5 I

Which is more than the actual current provided by the current source.

So if we use current source only I current will light the bulbs , but when voltage source is used 1.5 I current will light them.

More current leads to more brightness.

d -Ratio will be Dependant on the current source.

As the voltage is same across both ends of parallel combination.

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