Rank m order, from brightest to dimmest, the identical Mbs A to 0 A = B:C = D A

Question

Rank m order, from brightest to dimmest, the identical Mbs A to 0 A = B:C = D A > B > C: D A >> C > B > D A > C: D > B C s 0 > B > AA lamp draws a 66 mA current when connected to o 6 V battery When a 9 V battery used, the a-np draws 74 mA Does the lamp obey Ohm's law' no yes Impossible to tell Two light bulbs are wired in sends and connected to 12-volt battery. what the current the battery tf a third bulb is wired m parallel with the other two bulbs' T0 the power Both increase. Both decrease Decreases; increases: decreases

Explanation / Answer

6)
All the Current will flow through Bulb A , and then it will get divided btw Bulb B & Bulb C,D . Same Current will flow through Bulb C&D. Current in Bulb B > Current in Bulb C Or D.

So,
Correct Option is
A > B > C = D

7)
I = 66 mA
V = 6

V = I * R
6 = 66 * 10^-3 R
R = 1000/11

I = 74 mA
V = 9 V

V = I * R
9 = 74 * 10^-3 R
R = 9000/74

As the two resistance are not equal so it does not follow Ohm's Law.

Correct Option :- (A)

8)
Let the Resistance of each bulb be R.

Initially Req = R + R = 2R
I = V/2R

After Adding Bulb in Parallel,
Req = 1/(1/R + 1/2R)
Req =   2R/3

I = 3V/2R

So we can clearly see, Current will Increase !!

Power = V*I
As Current increases , Power will also Increase !!

Correct option :- (Both will Increase !!)

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