Diodes and Transistors

Where are depletion layers formed?

• In silicon chips

• On the ends of diodes

• Where the current is strongest

• At boundaries between p and n-type regions of a diode

• At boundaries between p and p-type regions of a diode

A diode whose holes and free electrons are drawn

away from each other is ____.

• forward-biased

• reverse-biased

• given a net positive charge

• given a net negative charge

• converted to a transistor

The diagram shows a series circuit with a battery, a

resistor, and an LED. If the current is 10 mA, what is

the resistance?

• 490

• 506

• 600

• 680

• 760

A reverse-bias diode acts as a very high-value _____.

• battery

• resistor

• switch

• transistor

• semiconductor

a circuit connecting a diode, a 550 Ω resistor, and a power supply that forward biased the diode. If the diode with a voltage drop of

0.7 V has a current of 0.015 A, what is the voltage of

the power supply?

• 7

• 8

• 9

• 10

• 12

Tags

NGSS.HS-PS3-5

What is the current in the circuit?

• A. 5/40 A

• B. 5/50 A

• C. 5/10 A

• D. 5/20 A

• E. 10/15 A

Tags

NGSS.HS-PS2-5

When a P-type semiconductor is suitably joined to an N-type semiconductor, then resulting arrangement is

called___________.

• P-N junction

• resistance

• transistor

• inductor

The potential difference created across the P-N junction due to the diffusion of electrons and holes is called___________

• potential barrier

• back emf

• instantaneous speed

the figure A shows

• forward bias

• reverse bias

Tags

NGSS.HS-PS3-5

The figure B shows:

• reverse bias

• forward bias

Tags

NGSS.HS-PS2-5