Alternative Current - Impedance

When a conductor is moved through a magnetic field, an _______ is induced in the conductor.

• electro-galvanic current (EMC)

• electro-magnetic pulse (EMP)

• electromotive force (EMF)

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Whenever a voltage or current passes through a series of changes, returns to the starting point, and then again starts the same series of changes, the series is called a ______.

• cycle
• period

• alternation

The frequency is the number of _____ of AC per second (1 second).

• cycles
• period

• alternations

Tags

NGSS.HS-PS4-1

The time required for a sine wave to complete one full cycle is called a ______.

• alternation

• cyclic time

• period

Tags

NGSS.HS-PS4-1

6. An _______ of voltage or current is the induced voltage or current flowing at any instant during a cycle.

• instantaneous value
• induced value

• intrinsic value

The ______ is the largest instantaneous value

• power value

• induced value

• peak value

What is the unit of measurement for frequency?

• Hertz

• Joules

• Volts

Tags

NGSS.HS-PS4-1

Effective value is also known as the _____ value or root mean square, which refers to the mathematical process by which the value is derived.

• MRS

• SRS

• RMS

The effective value of a sine wave is actually a measure of the _________ of the sine wave.

• resistive effect
• heating effect

• counter EMF

When two waves, such as current and voltage are exactly in step with each other, they are said to be in _____ .

• conjunction

• parallel

• phase

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3