Having trouble with Physics problems!! Please Help !!! 9. If you need to build a

Question

Having trouble with Physics problems!! Please Help !!!

9. If you need to build an equivalent capacitor that has a greater capacitance than any capacitor you have, then you build them in series. (True or False)?

10. When capacitors are in a circuit, current varies with time. (True or False)?

11.If R1=5 and R2=10 then the voltage drop across R2 is greather than for R1. (True or False)?

12. Calculate the equivalent capacitance if C1=5.0 F; C2=0.050 F; C3=0.75 F.

13. The amount of force that a current carrying wire feels in a uniform magnetic field depends on the amount of current. (True or False)?

14. What is the SI unit for inductance?

15. A section of wire that carries current I lies inside a uniform magnetic field. In which direction will the wire feel a force? (Up, Down, Into the board, or Out of the board)

16.In which direction will the proton feel a force the instant it enters the uniform magnetic field?  (Up, Down, Into the board, Out of the board, right or left)

Explanation / Answer

9) False

becaause, in series combination the effective cpapacitance is smaller than the smallest capaciatnce in the combination.

10) False

11) True

because, V = I*R

if more is R values, then more is V values across the resistor

12)

1/Cnet = 1/C1 + 1`/C2 + 1/C3

1/Cnet = 1/5 + 1/0.05 + 1/0.75

Cnet = 0.0464 F

13) True.

Because, F = B*I*L*sin(theta)

14) Henry

15) Down

16) Up

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