Example Questions
Example Question #1 :Electricity And Magnetism
Calculate the magnitude of the electric field at a point that is locateddirectly north of a point charge,.
The magnitude of an electric field due to a single point charge is given by the formula:
The variablerefers to Coulomb's constant. We are given the charge and the distance between points. To use the equation, first convert the distance to meters.
We can now use the given constant, charge, and distance in the equation to solve for the magnetic field strength.
Example Question #1 :Electric Circuits
What is the voltage of a circuit withof current andof resistance?
For this problem, use Ohm's law:. In this equationis the voltage,is the current, andis the resistance.
Plug in the given values and solve for the voltage.
Example Question #1 :Circuit Calculations And Concepts
What is the current of a circuit with a voltage ofand a total resistance of?
For this problem, use Ohm's law:. In this equationis the voltage,is the current, andis the resistance.
We can re-arrange the equation to solve specifically for.
Plug in the given values for voltage and resistance to solve for the current.
问题# 3:例子Circuit Calculations And Concepts
What is the resistance in a circuit with a voltage ofand a current of?
For this problem, use Ohm's law:. In this equationis the voltage,is the current, andis the resistance.
We can re-arrange the equation to solve specifically for.
Plug in the given values for voltage and current and solve for resistance.
Example Question #4 :Circuit Calculations And Concepts
Abattery is connected to a circuit. The measured current is. What is the equivalent resistance?
For this problem, use Ohm's law:.
We are given the voltage and current, allowing us to solve for the resistance.
Example Question #1 :Electric Circuits
A closed electric circuit is set up so that there is a current ofand a voltage of. What is the resistance in the circuit?
For this problem, use Ohm's law:.
We are given the current and the voltage. Using these terms, we can solve for the resistance.
Example Question #6 :Circuit Calculations And Concepts
The current in a circuit is. If the voltage is, what is the total resistance?
For this problem use Ohm's law:
We are given the current and the voltage, allowing us to solve for the resistance.
Example Question #7 :Circuit Calculations And Concepts
An electrical circuit has a total ofresistance and. What is the current?
For this problem use Ohm's law:
我们给出了电阻和电压,允许ing us to solve for the current.
Example Question #8 :Circuit Calculations And Concepts
An electrical circuit has a current ofandof resistance. What is the voltage?
For this problem use Ohm's law:
We are given the resistance and the current, allowing us to solve for the voltage.
Example Question #9 :Circuit Calculations And Concepts
An electrical circuit has a current ofandof resistance. What is the voltage?
For this problem use Ohm's law:
We are given the resistance and the current, allowing us to solve for the voltage.