Electric Currents Review
Name ________________________ Date ___________ Block ___
Electric Currents Review
1) When work is done on a positive test charge to move it from one location to another, potential energy ______________ (increases, decreases) and electric potential _____________________ (increases, decreases).
2) When a positive test charge naturally moves from one location to another (without the exertion of a non-conservative force), potential energy _________________ (increases, decreases) and electric potential ______________ (increases, decreases).
3) The diagram at the right shows a light bulb connected to a 12-V car battery. The + and - terminals are shown.
a. As a + charge moves through the battery from D to A, it ____________ (gains, loses) potential energy and _____________ (gains, loses) electric potential. The point of highest energy within a battery is the __+__ (+, - ) terminal.
b. As a + charge moves through the external circuit from A to D, it _____________ (gains, loses) potential energy and ______________ (gains, loses) electric potential. The point of highest energy within the external circuit is closest to the __+__ ( +, - ) terminal.
c. Use >, <, and = signs to compare the electric potential (V) at the four points of the circuit.
VA VB VC VD
4) The role of a battery in an electrical circuit can be described in three different ways. First, it is the energy supply. Second, the energy supplied by the battery is required to do work upon the charge to move it against the electric field from the negative terminal to the positive terminal. And third, by moving the charge against the field from negative to positive terminal, the battery establishes an electric potential difference across the two ends of the external circuit.
Without a potential difference between two locations, charge will not move. When there is an electric potential between two locations, charge will move from the location of high potential to the location of low
Electric Currents Review
1) When work is done on a positive test charge to move it from one location to another, potential energy ______________ (increases, decreases) and electric potential _____________________ (increases, decreases).
2) When a positive test charge naturally moves from one location to another (without the exertion of a non-conservative force), potential energy _________________ (increases, decreases) and electric potential ______________ (increases, decreases).
3) The diagram at the right shows a light bulb connected to a 12-V car battery. The + and - terminals are shown.
a. As a + charge moves through the battery from D to A, it ____________ (gains, loses) potential energy and _____________ (gains, loses) electric potential. The point of highest energy within a battery is the __+__ (+, - ) terminal.
b. As a + charge moves through the external circuit from A to D, it _____________ (gains, loses) potential energy and ______________ (gains, loses) electric potential. The point of highest energy within the external circuit is closest to the __+__ ( +, - ) terminal.
c. Use >, <, and = signs to compare the electric potential (V) at the four points of the circuit.
VA VB VC VD
4) The role of a battery in an electrical circuit can be described in three different ways. First, it is the energy supply. Second, the energy supplied by the battery is required to do work upon the charge to move it against the electric field from the negative terminal to the positive terminal. And third, by moving the charge against the field from negative to positive terminal, the battery establishes an electric potential difference across the two ends of the external circuit.
Without a potential difference between two locations, charge will not move. When there is an electric potential between two locations, charge will move from the location of high potential to the location of low