1. 45 A of current passes through a cross section of wire. How many charges pass through in 3 seconds?
A. 9.375 x 10^19
B. 3.59 x 10^16
C. 2.16 x 10^17
D. 8.4 x 10^20

2. A 30 ohm resistor dissipates 500W of power. What current is running through the resistor?
A. 15000 A
B. 16.6 A
C. 4.06 A
D. 0.052 A

3. How is current affected if the number of charge carriers decreases?
A. The current increases.
B. The current decreases.
C. The current initially decreases and then is gradually restored.
D. The current is not affected.

4. The current in an electron beam in a cathode-ray tube is 7.0 x 10^-5 A. How much charge hits the screen in 5.0 s?

5. A wire carries a steady current of 0.1 A over a period of 20 s. What total charge moves through the wire in this time interval?

Solution Preview

1.)
Because, I = q/t,
i.e.,
45A current means 45 coulomb charge pass throgh the given cross section in 1 second.

Therefore, the charge which can pass through the given cross-section in 3 seconds = 3*45 = 135 Coulomb
Because, ...

Solution Summary

The solution applies simple, easy-to-understand formulae linking charge and current together in order to answer these short multiple choice questions concerning charge carriers and current through resistors.

Three resistors having resistances of 1.20ohms , 2.60ohms , and 5.00 ohms are connected in series to a 26.0 V battery that has negligible internal resistance.
1) Find the equivalent resistance of the combination
2) Find the current in through 1.60, 2.50, and 5.00ohms resistors.
3) Find the total current through the ba

See attached file for full problem description with proper symbols and diagram.
The figure below shows a circuit with a battery and 3 resistors. The resistors have values of 4?, 3?, and 6? as shown. The battery is 18V.
1) Calculate the equivalent resistance of the combination of resistorsand the current in each resist

The capacitor in the figure (see attachment) is initially uncharged. The switch is closed at t=0.
1.) Immediately after the switch is closed, what is the current through the resistors R1, R2, and R3?
2.) What is the final charge on the capacitor?

A circuit consists of two 100 ohm resistors in series. What is the voltage across each resistor when
a. The current through the resistors is 10 mA?
b. The current through the resistors is 50 mA?

A 20 volt battery is connected to two resistors that are wired in parallel. The resistor values are 120 Ohms and 60 Ohms.
a. What is the current delivered by the battery?
b. What is the current through the 120 Ohms resistor?
c. What is the current through the 60 Ohms resistor?

Please draw a circuit diagram in which a resistor has a nonzero current flowing through it, but in which the current from the battery is
(a) as small as possible
(b) as large as possible (Without short circuiting the battery)
Using 12.0 - V battery of negligible internal resistance
Four resistors: 100, 30, 20, and 10 o

You have 5 resistors, all of which have different values. The resistors are 50, 40, 30, 20 and 10 ohms. Which of the following statements are true about combinations of these resistors?
True False if you put all 5 resistors in parallel, the equivalent resistance will be greater than 50 ohms
True False when the resistor

Hi. Can someone please walk me through how to do the following problem?
Two resistors are connected in series to a battery with an emf of 12 V. The voltage across the first resistor is 2.2 V and the current through the second resistor is 0.15 A. Find the resistance of the two resistors.
Thank you.

A 12 volt battery and two resistors are wired in series. The resistor values are 80 Ohms and 40 Ohms.
a. What is the current through the resistors?
b. What is the voltage across the 80 ohm resistor?
c. What is the voltage across the 40 ohm resistor?