# Worksheet: Current Rectification

In this worksheet, we will practice describing the use of a commutator in converting the output of an alternating-current generator to direct current.

Q1:

The motion of an alternating current generator at the successive instants and is shown in two images. The output of the current is rectified using a commutator. Which of the following images correctly represents the position of and output from the generator at an instant , where ? Green arrows represent induced current. • A • B • C • D Q2:

The motion of an alternating-current generator at the successive instants and is shown in two images. The output of the current is rectified using a commutator. Which of the following images correctly represents the position of and output from the generator at an instant , where ? Green arrows represent induced current. • A • B • C • D Q3:

The motion of an alternating current generator at the successive instants and is shown in two images. The output of the current is rectified using a commutator. Which of the following images correctly represents the position of and output from the generator at an instant , where ? Green arrows represent induced current. • A • B • C • D Q4:

The motion of an alternating current generator at the successive instants , , and is shown in three images. The output of the current is rectified using a commutator. Which color line on the graph correctly shows the output of the generator between and ? Green arrows represent induced current.    • ABlue
• BBlack
• CRed
• DGreen

Q5:

The motion of an alternating current generator at the successive instants , , and is shown in three images. The output of the current is rectified using a commutator. Which color line on the graph correctly shows the output of the generator between and ? Green arrows represent induced current. • ARed
• BBlue
• CBlack
• DGreen

Q6:

The motion of an alternating-current generator at successive instants and is shown in two images. The output of the current is rectified using a commutator. Which of the following images correctly represents the position of and output from the generator at an instant , where ? Green arrows represent the current induced. • A • B • C • D Q7:

A rectified alternating-current generator contains four coils that are aligned to each other at equal-interval angles, as shown in the diagram. The graph shows the output of the generator, where the orange line corresponds to the whole output and the black line corresponds to the output of loop II only. The origin of the graph corresponds to the loops occupying the positions shown in the diagram. Which loop’s output corresponds to the blue line?

• AIII
• BI
• CII
• DIV

Which color line corresponds to the total output of all the loops?

• AOrange
• BBlack
• CNone of the lines

Q8:

The motion of an alternating-current generator at successive instants , , and is shown in three images. The output of the current is rectified using a commutator. Which color line on the graph correctly shows the output of the generator between and ? Green arrows represent induced current.    • ARed
• BGreen
• CBlue
• DBlack

Q9:

The motion of an alternating current generator at successive instants , , and is shown in three images. The output of the current is rectified using a commutator. Which color line on the graph correctly shows the output of the generator between and ? Green arrows represent induced current.    • APurple
• BRed
• CBlue
• DGreen

Q10:

The motion of an alternating-current generator at successive instants , , and is shown in three images. The output of the current is rectified using a commutator. Which color line on the graph correctly shows the output of the generator between and ? Green arrows represent induced current. • ABlue
• BGreen
• CRed
• DBlack