NEET Physics: Questions 1057  1061 of 2142
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Question number: 1057
Question
There is a convex mirror of radius 50 cm. The image of a point at a distance 50 cm from the pole of mirror on its axis will be formed at:
Choices
Choice (4)  Response  

a.  16.67 cm behind the mirror 

b.  Infinity 

c.  Pole 

d.  Focus 

Question number: 1058
» Ray Optics » Lens Maker's Formula and Lens Formula
Question
A convex lens of focal length 20 cm is placed in contact with a diverging lens of unknown focal length. The lens combination acts as a converging lens and has a focal length of 30 cm. What is the focal length of the diverging lens
Choices
Choice (4)  Response  

a.   30 cm 

b.   60 cm 

c.   10 cm 

d.   90 cm 

Question number: 1059
Question
A concave minor of focal length f _{0} (in magnitude) produces a reals image n time the size of the object. What is the distance of the object from the mirror?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 1060
» Electromagnetic Waves » Electromagnetic Spectrum » Visible
Question
The range of wavelength of the visible light is
Choices
Choice (4)  Response  

a.  4, 000 Å to 8, 000 Å 

b.  8, 000 Å to 10, 000 Å 

c.  10 Å to 100 Å 

d.  10, 000 Å to 15000 Å 

Question number: 1061
» Electromagnetic Induction & Alternating Currents » Power in AC Circuits
Question
An ac supply gives 30 V, rms which passes through a 10 Ω resistance. The power dissipated in it is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

