Question

Quantization of charge was experimentally demonstrated by? Option 1: Millikan's oil drop experiment. Option 2: Davisson and Germer experiment. Option 3: Frank-Hertz experiment. Option 4: Einstein's photoelectric effect.

Answer 1

The quantization of charge was demonstrated by Robert A. Millikan's oil drop experiment, which calculated the charge of a single electron to be -1.6 x 10^-19 C.

Step-by-step explanation:

The quantization of charge was experimentally demonstrated by Robert A. Millikan through his famous Millikan's oil drop experiment. Carried out between 1908 and 1917, this experiment determined the charge of a single electron. Millikan sprayed oil droplets into an apparatus, these droplets became electrically charged through friction or by X-rays, and their fall due to gravity could be countered by an electric field. By balancing the gravitational force on the ionized drops with the electric force, and making accurate measurements and calculations, Millikan was able to calculate the charge on a single electron. The resulting value, a constant of -1.6 × 10-19 C, proved that electric charge is quantized. Thus, the correct answer is Option 1: Millikan's oil drop experiment.

Answer 2

Quantization of charge was experimentally demonstrated by Robert Millikan's oil drop experiment.

Millikan's oil drop experiment, conducted by Robert Millikan in 1909, provided experimental evidence for the quantization of electric charge. The experiment aimed to measure the elementary charge, the fundamental unit of electric charge carried by a single electron.

Millikan's experiments showed that the electric charge on any individual droplet was quantized, meaning it was a multiple of a fundamental unit of charge.

The smallest observed charges were integral multiples of approximately
`1.602 \: X\: 10^-19` coulombs, which is the charge of a single electron.

Significance:

Millikan's work provided strong experimental support for the quantization of electric charge, confirming that electric charge comes in discrete units.

The value he obtained for the elementary charge was close to the currently accepted value.

In summary, Millikan's oil drop experiment was crucial in establishing the quantization of electric charge and determining the charge of a single electron.

Option 1 is the correct answer.

Question:

Quantization of charge was experimentally demonstrated by?

Option 1: Millikan's oil drop experiment.

Option 2: Davisson and Germer experiment.

Option 3: Frank-Hertz experiment.

Option 4: Einstein's photoelectric effect.