ECAT Pre Computer Science Chapter 19 MCQ Test With Answer for Physics chapter 19 (Dawn of Modern Physics)

ECAT Computer Science Physics Ch 19 Test
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Online MCQ`s Test For Chapter 19 "ECAT Physics Chapter 19 Dawn of Modern Physics Online Test"

Try The MCQ`s Test For Chapter 19 "ECAT Physics Chapter 19 Dawn of Modern Physics Online Test"

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ECAT Physics Chapter 19 Dawn of Modern Physics Online Test

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Question # 1

Electromagnetic -radiation means:

Question # 2

As the light shines on the metal surface, the electrons are ejected

Question # 3

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

Question # 4

In the compton's effect, it is found that the wavelength of incident x-rays is

Question # 5

The positron was discovered by:

Question # 6

When a position comes close to an electron they annihilate into photons such that

Question # 7

There is no way to detect:

Question # 8

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

Question # 9

The concept of direction and position are purely

Question # 10

Davision and Germer performed experiment to verify

Question # 11

The unit of work function is:

Question # 12

When a platinum wire is heated, it appears white at

Question # 13

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

Question # 14

The length contraction happens only

Question # 15

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

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ECAT Pre Computer Physics Chapter 19 Test

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