We are given two light bulbs, a 30-watt bulb and a 60-watt bulb. If the some vol

Question

We are given two light bulbs, a 30-watt bulb and a 60-watt bulb. If the some voltage IS applied to both which of the following statements is true? The 30-watt bulb carries a greater current and has the higher resistance The 30-watt bulb carries a greater current but the 60-watt bulb has the higher resistance The 30-watt bulb has the higher resistance but the 60-Wallt bulb carries a greater current The 60-watt bulb carries a greater current and has the higher resistance In using rules you generally assign a separate unknown current to each resistor in the circuit THE Conductors shown below are made of the same material. Rank from largest to smallest, the range of each conductor. Which of the following represents the potentials from point a to point e?

Explanation / Answer

2)We Use,

P= VI => I = P/V

I directly proportional to P.

Means 60W has higher current.

Now

R= V/I

Here R is inversely proportional to

Means more I has less R and vice versa.

Hence option C) is correct.

3) In KCL we assign a separate unknown current to each resistor in the circuit.

4)

R = *L/A = *(L/r2)

Ra = *(L/r2)

Rb = *(L/(2r2)) = *(L/4r2) = Ra/4

Rc = *(2L/r2) = 2Ra

Rc = *(2L/(2r2)) = *(2L/42r2)) = *(L/2r2) = Ra/2

5)

By using KCL we write,

Va= (R1+R2+R3+R4+R5)*I = 10*2= 20V

Thus option E is correct.

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