NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 1174  1178 of 2184
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Question number: 1174
Question
The equation of two light waves are , . The ratio of maximum to minimum intensities produced by the superposition of these waves will be
Choices
Choice (4)  Response  

a.  1: 49 

b.  49: 1 

c.  7: 1 

d.  1: 7 

Question number: 1175
» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation
Question
An electromagnetic radiation of frequency 3 × 10 ^{15} cycles per second falls on a photo electric surface whose work function is 4.0 eV Find out the maximum velocity of the photo electrons emitted by the surface
Choices
Choice (4)  Response  

a.  13.4 × 10 ^{19 } m/s 

b.  19.8 × 10 ^{19 } m/s 

c.  1.73 × 10 ^{6 } m/s 

d.  All of the above 

Question number: 1176
» Dual Nature of Matter and Radiation » DeBroglie Relation
Question
A radio station is transmitting waves of wavelength 300 m. If diffracting power of transmitter is 10 kW, then numbers of photons diffracted per second is
Choices
Choice (4)  Response  

a.  1.5 × 10 ^{33} 

b.  1.5 × 10 ^{29} 

c.  1.5 × 10 ^{31} 

d.  1.5 × 10 ^{35} 

Question number: 1177
» Properties of Solids & Liquids » Heat Transfer » Radiation
Question
f between wavelength λ and λ + dλ, e _{λ} and a _{λ} be the emissive and absorptive powers of a body and E _{λ} be the emissive power of a perfectly black body, then according to Kirchhoff’s law, which is true
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1178
» Properties of Solids & Liquids » Elastic Behavior
Question
The ratio of radii of two wires of same material is 2: 1. If these wires are stretched by equal forces, then the ratio of stresses produced in them will be
Choices
Choice (4)  Response  

a.  4: 1 

b.  1: 4 

c.  1: 2 

d.  2: 1 
