a A butb arud a battery are connected as shown below a Which is true about the c

Question

a A butb arud a battery are connected as shown below a Which is true about the current at various points in this circuit? A. The current is largest at A. B. The current is largest at B C. The current is largest at C D. The current is largest at D E. The current is the same everywhere. For Questions 7-10, a second identical bulb is added to the circuit in Question 6, as shown below 7. Compare the current at A now to the current at A before with only one bulb. A The current at A is now twice as large as B. The current at A is now larger than before but not twice as large. C. The current at A is the same as before D. The current at A is now half as large as before E. The current at A is now smalter than before but not half as large. 8. Compare the current through the bulb connected between B and C now to the current through it before when there was only one bulb. The current is larger than it was before. B. The current is the same as before. C. The current is smaller than it was before. A 9. Compare the brightness of the bulb connected between B and C now to its brightness before when there was only one bulb. A. The bulb is brighter than it was betore. B. The bulb is just as bright as before. C. The buib is dimmer than it was before. 10. Compare the potential difference across the bulb, Vec, now to what it was before when th was only one bulb. A. The potential difference is now twice as large as before. B. The potential difference is now larger than before but not twice as large. C. The potential difference is the same as before. D. The potential difference is now halt as large as before. E. The potential difference is now smaller than before but not half as large. Electricity and Optics Physics 202 Page 4 of 7

Explanation / Answer

Question 6)))

E) Current is same everywhere.

because it is a series connection and everything is connected in series.

Question 7)))

A) Twice as large as before.

reason is ohm's law.V=IR.

Since a bulb, let of resistance R is connected in parallel to another bulb of R resistance,

=> effective R=R/2

V=I1R1=I2R2=I2R/2

=>I2=2I1

Question 8)))

B)same as before.

As 2I1 current goes from battery, half to one bulb and half to other bulb.

Question 9)))

B) just as before.

because power delivered to both the bulb is same.

Question 10)))

C) same as before.

as because it is a parallel combination.

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