Electricity & Magnetism Finals Quiz

In a circuit, which component is responsible for storing electrical energy and releasing it when needed?

• Resistor

• transistor

• Capacitor

• Diode

In an electronic circuit, which component limits the current flow and controls the discharge rate of a capacitor?

• Resistor

• transistor

• Capacitor

• Diode

What characterizes an open circuit in an electrical system?

• Low resistance

• High voltage

• Continuous current flow

• Discontinuity in the circuit path

A capacitor with a capacitance of 50 pF increases to 150 pF when a dielectric material is inserted between its plates. What is the dielectric constant of the material?

• 3

• 50

• 150

• 7500

What is the equivalent resistance of the circuit shown? Each capacitor has a capacitance of 3 microfarads.

• 2

• 3

• 6

• 9

The greatest equivalent resistance occurs when resistances are connected in which type of arrangement?

• Series

• Parallel

• Series-parallel

• Combination

In which type of circuit would you expect the same voltage with an increased current as more and more resistances are added to the circuit?

• Series Circuit

• Parallel Circuit

• Open circuit

• Combination Circuit

When using a voltmeter to measure current in an electrical circuit, where should it be connected?

• In parallel to the circuit

• In series with the circuit

• Across the resistor

• Between the battery terminals

A conductor that has the least resistance has the following characteristics:

• Thin, long, and hot.

• Thick, short, and cool.

• Thick, long, and hot.

• Thin, short, and cool.

All of the following variables are directly proportional to the resistance, EXCEPT:

• Length of Conductor

• Cross-sectional area of conductor

• Temperature of conductor

• Resistivity