Exam 8: Electricity and Magnetism

In a battery circuit with different resistors in parallel,

Which of the following would be the least conductive?

A steady current of 0.15 A exists in a wire for 20 s. a. How much net charge passes by a point in the wire? b. How many electrons does this charge represent?

In a dc motor, the polarity and current are reversed by a(n) ______________.

Earth's magnetic field

If a positively charged object is brought near a suspended, positively charged object, the suspended object will be

Ohm's law gives the relationship between

Voltage has the units of ______________, which is called a volt.

Electric charge is measured in units of

Three resistors, 10 Ω, 20 Ω, and 30 Ω, are wired in series and connected to a 120-V battery. How much current flows in the circuit?

An object that is negatively charged will

A(n) ______________ converts mechanical energy into electrical energy.

According to the law of poles, like poles ______________.

According to the law of charges, unlike charges ______________.

An object that is negatively charged will

The mathematical form of Coulomb's law is similar to that of

Three resistors, 30 Ω, 20 Ω, and 60 Ω, are wired in series and connected to a 120-V battery. What is the equivalent resistance for this circuit?

If two protons are moved 3 times closer together, the electrical force between them is what factor of the original force?

A(n) ______________ is an elementary particle with no charge.

A circuit breaker is connected in ______________ in a circuit.