A physics teacher says electric charge is quantized. What does that mean for an object's net charge?

Which value is conventionally used for the elementary charge e in high school physics calculations?

In the equation q = ne for quantized charge, what does n represent?

If $e=1.60\times 10^{-19}$ C, which net charge could an isolated object have?

What is a photon in the context of quantized light energy?

For electromagnetic radiation of frequency f, Planck's energy quantum is given by which expression?

An atom has quantized energy levels. Which statement describes its energy?

A system can gain energy only in quanta of $4.00\times 10^{-21}$ J. Which energy gain is allowed?

What charge does an electron carry compared with the elementary charge e?

Which statement best corrects the idea that 'quantized' means 'small'?

A plastic rod carries a total negative charge of $8.00\times 10^{-19}$ C. The elementary charge is $e=1.60\times 10^{-19}$ C. How many excess electrons are on the rod?

A neutral object loses 12 electrons. Use $e=1.60\times 10^{-19}$ C. What is its new net charge?

An oil drop has charge $-6.40\times 10^{-19}$ C. The elementary charge is $e=1.60\times 10^{-19}$ C. How many excess electrons does it have?

A metal sphere has net charge $+3.20\times 10^{-18}$ C. If $e=1.60\times 10^{-19}$ C, how many electrons were removed from a neutral sphere?

Nine excess electrons are placed on a small bead. If $e=1.60\times 10^{-19}$ C, what is the bead's net charge?

A dust particle has charge $-2.40\times 10^{-18}$ C. The elementary charge is $e=1.60\times 10^{-19}$ C. How many excess electrons are on it?

A neutral sphere loses $2.50\times 10^6$ electrons. If $e=1.60\times 10^{-19}$ C, what net charge remains?

A pith ball's net charge is $+4.80\times 10^{-19}$ C. If $e=1.60\times 10^{-19}$ C, how many elementary positive charges does this equal?

A photon has frequency $5.00\times 10^{14}$ Hz. Using $h=6.63\times 10^{-34}$ J·s, what is its energy?

For radiation at $2.00\times 10^{14}$ Hz, $h=6.63\times 10^{-34}$ J·s. What energy step ΔE = hf is allowed?

A system has 7 quanta of energy, each $3.00\times 10^{-21}$ J. What total quantized energy is stored?

A measured energy is $4.20\times 10^{-20}$ J, and one allowed quantum is $7.00\times 10^{-21}$ J. How many quanta are present?

Use the table of Millikan-style oil-drop charges. Which value is the smallest charge unit suggested by all four measurements?

Read the oil-drop charge table. Which charge unit makes every listed measurement a whole-number multiple?

Use the table of energy readings. What smallest energy quantum is suggested by the pattern?

The table shows measured charges on four oil drops. Which unit is common to every charge in the table?

Look at the system-energy table. Which energy step divides all four measurements evenly?

Use the oil-drop table to infer the charge unit. Which value fits every row as a whole-number multiple?

The table lists allowed energies for one system. Which quantum is consistent with all the values?

From the oil-drop charge table, what elementary charge value is supported by the measurements?

Four measured charges are 1.60, 3.20, 4.80, and $6.40\times 10^{-19}$ C, while repeated trials never give $2.40\times 10^{-19}$ C. What conclusion fits the pattern?

A student says an object with $1.60\times 10^{-6}$ C of charge cannot be quantized because it is not tiny. What is wrong with that reasoning?

Robert Millikan suspended charged oil drops in an electric field. What did the oil-drop measurements establish?

Which statement correctly connects Millikan and Planck?

Planck introduced quantized energy while studying blackbody radiation. What did that idea say about emission or absorption?

In a photoelectric-effect demonstration, low-frequency light ejects no electrons even when very bright, but higher-frequency light does. Which idea explains this?

A lab group proposes $4.00\times 10^{-21}$ J as the energy quantum for a system, but then measures $6.00\times 10^{-21}$ J. What should they conclude if the measurement is reliable?

A charge sensor reports $+2.40\times 10^{-19}$ C on an isolated object. If $e=1.60\times 10^{-19}$ C, what should you suspect?

Which quantity is usually modeled as continuous in introductory mechanics rather than quantized in this unit?

Two different systems have energy quanta of $2.00\times 10^{-21}$ J and $5.00\times 10^{-21}$ J. What follows?