Which of the following quantities must be the same for resistors in series volta

Question

Which of the following quantities must be the same for resistors in series voltage current power energy none of the above. Two resistors (A and B) are connected in series to a 12V battery Resistor A has 9V across it. Which resistor has the least resistance? A B both have the same can't tell from the data give Two resistors (A and B) are connected in parallel to a 12V battery. Resistor A has 2.0A in it and the total current in the battery it 3.0A Which resistor has the most resistance? A R both have the same can't tell from the data give To accurately measure the voltage across a 1k Ohm resistor, the voltmeter should have a resistance that is much larger than 1kOhm much smaller than 1kOhm about the same as 1kOhm zero none of the above. To accurately measure the current in a 1kOhm resistor, the ammeter should have a resistance that is much larger than 1kOhm much smaller than 1kOhm about the same as 1kOhm as large as possible none of the above Which of the following statements concerning spherical minors is correct? A converging mirror alone can produce an ineverted virtual image A diverging minor alone can produce an ineverted virtual image A diverging minor alone can produce an ineverted real image A converging mirror alone can produce an ineverted real image

Explanation / Answer

7.

Correct answer: B) current

Reason:

V1= I*R1, V2= I*R2

P1= I*V1= I^2R1 , P2= I*V2= I^2R2

8.

Correct answer: B) B

Reason:

Since R1 and R2 are in series,

V= V1+V2 = I*R1+ I*R2 = I(R1+R2)

12 = 9 + V2 => V2= 3V

V1 = I*R1 => 9 = IR1

V2= I*R2 => 3= IR2

Since I is same for both resistors, R2<R1

9)

Correct answer: B) B

Reason:

Since R1 and R2 are in parallel,

V1=V2

I1*R1= I2*R2

And I1+I2 = 3   => I2 = 3 - 2= 1

2*R1 =1*R2 only possible when R2 > R1

Since I is unequal for both resistors, R2> R1

10) Correct answer: D) Zero

Voltmeter should have zero resistance

11) Correct answer: C) About the same as 1k

12) D) A converging mirror alone can produce an inverted real image

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