DC Power Test1

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        All the problems refer to the circuit on the left,

        where the switch S is closed at time t = 0.

        The direction of current flow is in the standard

        way, opposite to electron flow.

 

Problem 1:   

The power on the above circuit is 2W.  The battery voltage reads 5V.  What is the current flowing

through the circuit?

 

 I = A

 

Problem 2:

A current meter measures I = 0.5A for the circuit shown.  If the power dissipated by the resistor is 0.25W

what is voltage delivered by the power supply (battery)?

 

V =volts

 

Problem 3:

For a 10KOhm resistor the voltage measured across it is V = 3V.  Calculate the power dissipated by the

resistor and the current going through it.

 

P =mW;  I =mA

 

Problem 4:

A current of 12mA is delivered to a circuit with a 100 Ohm resistor.  Find the power delivered and the

voltage across the resistor.

 

P =mW;  V =volts

If you are done with Test1 here are the Solutions!

Ready to take Test2

 

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