Electric Circuits Answers

312 C of charge passes through an electrical device in 143 seconds. If the potential difference across the device is 2.88 volts, determine the energy transfer to the device. 

The energy transfer to a device is 112 000 J when there is a potential difference of 185 volts across it. If the current through the device is 0.0644 A, how long in hours is the current flowing? 

The cross-sectional area of a wire containing 0.67 A is 4.9 × 10^–7 m^2 . If there are 8.5 × 10^28 charge carriers per m^3 in this wire, what is the drift speed of the charge carriers?  

2 842 C of charge passes through a circuit in 3.25 minutes. What is the current in the circuit?  

 How much charge passes through a wire in 2.5 minutes if the current in the wire is 1.6 A? 

Calculate the electric field 0.245 cm from a point charge of 25.6 nC.

Identical point charges of 9.3 nC are 0.47 mm apart. Calculate the force between the two charges. 

If you wish to increase the amount of current in a resistor from 100mA to 150mA by changing The 20V source, by how many volts should you changes the source? To what new value should You set it

•In a circuit with a 100 ohm resistor and a 47 ohm resistor in series, there are 20 mA of current through the 100 ohm resistor. How much current is through the 47 ohm resistor?

A certain electrical device has an unknown resistance. You have available a 12 V battery and an ammeter. How would you determine the value of the unknown resistance? Draw the necessary circuit connections.