Understanding Imaginary Numbers

Understanding Imaginary Numbers

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Medium

Created by

Jennifer Brown

Used 3+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What was the initial problem that led to the definition of the imaginary unit?

Determining the value of pi

Solving equations with no real solutions

Calculating the area of a circle

Finding the square root of positive numbers

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why were imaginary numbers initially thought not to exist?

They were not visible on the number line

They had no practical applications at the time

They were only used in theoretical physics

They were too complex to understand

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an application of imaginary numbers?

Determining gravitational force

Measuring temperature

Analyzing electrical currents

Calculating the speed of light

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the square root of -4 expressed using the imaginary unit?

i4

i2

2i

4i

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of the square root of -25 using the imaginary unit?

25i

10i

5i

i25

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When simplifying the square root of a negative number, where should the 'i' be placed?

It doesn't matter

Before the square root

After the square root

Inside the square root

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a key property when multiplying square roots involving imaginary numbers?

The numbers must be equal

At least one number must be non-negative

Both numbers must be positive

Both numbers must be negative

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