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

ECAT Pre Engineering Physics Ch 19 Test
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MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics Physics Online Test

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Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics Physics Online Test

00:00
Question # 1

Davision and Germer performed experiment to verify

Question # 2

There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as

Question # 3

Electromagnetic -radiation means:

Question # 4

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

Question # 5

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

Question # 6

Practically the quantity v/c is always:

Question # 7

The positron was discovered by:

Question # 8

When a platinum wire is heated, it appears yellow at

Question # 9

When platinum wire is heated, it appears cherry red at

Question # 10

Wien's constant is measured in:

Question # 11

Photocell is a device which converts

Question # 12

The concept of direction is purely:

Question # 13

de-Broglies hypthesis was experimentally verified by

Question # 14

The general theory of relativity treats problems involving

Question # 15

According to the special theory of relativity, time is

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