Eamcet Physics - 2 nd Year : Unit 7.1 ( Dual Nature of Matter And Radiation ) - Dual Nature of Matter And Radiation Free Online Tests | Mock Tests | Preparation | Practice Tests

Study Room

Goto

Eamcet Physics
2 nd Year : Unit 7.1 ( Dual Nature of Matter And Radiation ) - Dual Nature of Matter And Radiation

Take Exam

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84

81 / 84

In an experiment on photoelectric emission from a metallic surface, wavelength of incident light is 2 x 10^–7 m and stopping potential is 2.5V. The threshold frequency of the metal (in Hz) approximately (charge of electron e = 1.6 x 10^–19C, Plank’s constant h = 6.6 x 10^–34 JS)

A. 12 x 10¹⁵

B. 9x 10¹⁵

C. 9 x 10¹⁴

D. 12 x 10¹³

E. None of the above

View Answer

Correct choice: C

Explanation:

None

81 / 84

Study Room

Lessons

Eamcet Physics 2 nd Year : Unit 7.1 ( Dual Nature of Matter And Radiation ) - Dual Nature of Matter And Radiation

Eamcet Physics
2 nd Year : Unit 7.1 ( Dual Nature of Matter And Radiation ) - Dual Nature of Matter And Radiation