NEET Physics: Questions 1099  1104 of 2142
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Question number: 1099
» Electromagnetic Induction & Alternating Currents » LCR Series Circuit
Question
In a series LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance would be changed from L to
Choices
Choice (4)  Response  

a. 


b. 


c.  2 L 

d.  4 L 

Question number: 1100
» Ray Optics » Power of a Lens
Question
A slide projector lens has a focal length 10 cm. It throws an image of a 2cm × 2cm slide on a screen 5 m from the lens. Find the size of the picture on the screen
Choices
Choice (4)  Response  

a.  (78 × 78) cm ^{2} 

b.  (64 × 64) cm ^{2} 

c.  (88 × 88) cm ^{2} 

d.  (98 × 98) cm ^{2} 

Question number: 1101
» Ray Optics » Lens Maker's Formula and Lens Formula
Question
An image is formed on the screen by a convex lens. When upper half part of lens is covered with black paper, then:
Choices
Choice (4)  Response  

a.  Half image is formed 

b.  Intensity of image will be enhanced 

c.  Full image is formed 

d.  None of the above 

Question number: 1102
» Electromagnetic Induction & Alternating Currents » Resonance
Question
In the nonresonant circuit, what will be the nature of the circuit for frequencies higher than the resonant frequency?
Choices
Choice (4)  Response  

a.  Resistive 

b.  Capacitive 

c.  Inductive 

d.  All of the above 

Question number: 1103
» Ray Optics » Power of a Lens
Question
If the focal length of a magnifier is 5 cm calculate the power of the lens.
Choices
Choice (4)  Response  

a.  15 D 

b.  20 D 

c.  10 D 

d.  5 D 

Question number: 1104
Question
A 0.5 cm high object is placed at 30 cm from a convex mirror whose focal length is 20 cm. Find the position and size of the image.
Choices
Choice (4)  Response  

a.  6 cm, 0.5 cm 

b.  12 cm, 0.2 cm 

c.  5 cm, 0.1 cm 

d.  18 cm, 0.2 cm 
