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An electron propagating along the X-axis passes through a slit of width ∆y = 1 nm. The uncertainty in the y-component of its velocity after passing through the slit is

Correct Answer: 7.322 x 10<sup>5</sup> m/s

An automatic box was the property of the company. The box contained a slit of sufficient size to admit a coin and a projecting button. The box was so constructed that upon a coin being dropped into the slit and the button being pushed in, a chocolate would be ejected from the box. 'A' dropped into the slit a brass disc about the size and shape of the coin, and thereby obtained a chocolate. 'A' is

Find the velocity of an electron when its kinetic energy is equal to one electron volt (in 105m/s). Given charge of an electron e = 1.6 x 10-19 and mass of an electron m = 9.1 x 10-31.

Which of the following statement is true about Type-A uncertainty? Statement 1: Most of the systematic uncertainty is Type-A uncertainty. Statement 2: Type-A uncertainties vary each and every time a measurement is made.

If calibration certificate state the uncertainty at Xσ (X is numerical value) and quoted uncertainty is N, then what is the value of standard uncertainty?

Which of the following option is true for given statements about expanded uncertainty and coverage factor? Statement 1: Last calculation is the expanded uncertainty when estimating uncertainty in measurement. Statement 2: In metrology industry, the mostly used value of the coverage factor is 2.

The uncertainty in the location of a particle moving with velocity 7.28 X 107m /s is two times its de-Broglie wavelength. What is the uncertainty in measuring the velocity?

A rectangular field of 200m by 120m has two roads running along its center, one along the length and the other along the width. If the width of the roads is 5m, what is the area covered by the two roads?

Which of the following are true regarding the Prime meridian?
1. It passes through the centre of a certain country
2. It passes through the centre of the Globe
3. It passes through the observatory at Greenwich, near London.

Read the following passage carefully and choose the most appropriate answer to the question out of the four alternatives.
The human eye is a complex part of the body that is used for seeing. Eyes enable people to perform daily tasks and to learn about the world that surrounds them. Sight, or vision, is a rapidly occurring process that involves continuous interaction between the eye, the nervous system, and the brain. When someone looks at an object, what he really sees is the light reflected from the object. This reflected light passes through the lens and falls on the retina of the eye. Here the light induces nerve impulses that travel through the optic nerve to the brain and then over other nerves to muscles and glands.
The eye is similar to a television camera. Both the eye and the television camera convert light energy to electrical energy. The eye converts light to nerve impulses that are interpreted by the brain as the sense perception called sight. A television camera converts light to electronic signals that are broadcast and transformed into light images in a television receiver. It is wonderful that human eyes blink an average of once every six seconds. This washes the eye with the salty secretion from the tear or lachrymal glands. Each tear gland is about the size and shape of an almond. These glands are situated behind the upper eyelid at the outer corner of the eye. After passing over the eye, the liquid from the gland is drained into the nose through the tear duct at the inner corner of the eye. The sense perception that the brain releases after the eye converts light to nerve impulses is known as

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. In a work ____________ art, each layer and texture, colour ____________ perspective creates an individualistic vision, which can mean different things to different viewers and even to its creator at different points of time. The audience does not ____________ see the struggle or uncertainty of the _____________ process, only its outcome. And sometimes, ___________ in the case of icons, the passage of time reveals the glow within. uncertainty of the _____________ process,