In tutorial, you compared the relative brightness of the bulbs m the three circu

Question

In tutorial, you compared the relative brightness of the bulbs m the three circuits shown In the diagrams boxes have been drawn around the networks of bulbs in each circuit. On the basis of your observations and the rule you developed in tutorial relating current through the battery and/or power supply to total resistance, rank the networks (boxes) A-C according to their equivalent resistance. Explain your reasoning on the basis of the model (Do not use math) Use the model for electric current to rank the networks shown below in order according to resistance Explain your reasoning

Explanation / Answer

1) In box A, only one bulb is used which has some resistance. In box B, two bulb are connected in series so resistance add up and hence resistance increases.

In box C, two bulb are connected in parallel. So equivalent resistance decreases.

Hence, C and A is brighter than B. C is more brighter or less brighter than A depends on the value of resistance of A.

Brighteness is related with power and power is inversely proportional to the resistance.

2)current is inversely proportional to resistance.

Consider all bulb have resistance 1 ohm.

In box A, resistance is 1 ohm.

In box B, resistance is 0.66 ohm.

In box C, resistance is 2 ohm.

In box D, resistance is 0.5 ohm.

So, D>B>A>E>C is the sequence of current.

In box E, resistance is 1.5 ohm.

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