### All High School Physics Resources

## Example Questions

### Example Question #1 : Electricity And Magnetism

Calculate the magnitude of the electric field at a point that is located directly north of a point charge, .

**Possible Answers:**

**Correct answer:**

The magnitude of an electric field due to a single point charge is given by the formula:

The variable refers 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 : Circuit Calculations And Concepts

What is the voltage of a circuit with of current and of resistance?

**Possible Answers:**

**Correct answer:**

For this problem, use Ohm's law: . In this equation is the voltage, is the current, and is the resistance.

Plug in the given values and solve for the voltage.

### Example Question #1 : Electricity And Magnetism

What is the current of a circuit with a voltage of and a total resistance of ?

**Possible Answers:**

**Correct answer:**

For this problem, use Ohm's law: . In this equation is the voltage, is the current, and is 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.

### Example Question #1 : Electric Circuits

What is the resistance in a circuit with a voltage of and a current of ?

**Possible Answers:**

**Correct answer:**

For this problem, use Ohm's law: . In this equation is the voltage, is the current, and is 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 #1 : Use Ohm's Law

A battery is connected to a circuit. The measured current is . What is the equivalent resistance?

**Possible Answers:**

**Correct answer:**

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 of and a voltage of . What is the resistance in the circuit?

**Possible Answers:**

**Correct answer:**

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 #1 : Electricity And Magnetism

The current in a circuit is . If the voltage is , what is the total resistance?

**Possible Answers:**

**Correct answer:**

For this problem use Ohm's law:

We are given the current and the voltage, allowing us to solve for the resistance.

### Example Question #1 : Electric Circuits

An electrical circuit has a total of resistance and . What is the current?

**Possible Answers:**

**Correct answer:**

For this problem use Ohm's law:

We are given the resistance and the voltage, allowing us to solve for the current.

### Example Question #2 : Electricity And Magnetism

An electrical circuit has a current of and of resistance. What is the voltage?

**Possible Answers:**

**Correct answer:**

For this problem use Ohm's law:

We are given the resistance and the current, allowing us to solve for the voltage.

### Example Question #1 : Electricity And Magnetism

An electrical circuit has a current of and of resistance. What is the voltage?

**Possible Answers:**

**Correct answer:**

For this problem use Ohm's law:

We are given the resistance and the current, allowing us to solve for the voltage.

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