KVPY (Kishore Vaigyanik Protsahan Yojana) StreamSA (Class 11) Physics: Questions 43  45 of 253
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Question number: 43
Appeared in Year: 2013
Question
A horizontal parallel beam of light passes through a vertical convex lens of focal length 20 cm and is then reflected by a tilted plane mirror so that it converges to a point I. The distance PI is 10 cm.
M is a point at which the axis of the lens intersects the mirror. The distance PM is 10 cm. The angle which the mirror makes with the horizontal is,
Choices
Choice (4)  Response  

a.  15° 

b.  45° 

c.  60° 

d.  30° 

Question number: 44
» Current Electricity » Series and Parallel Combinations of Resistors
Appeared in Year: 2013
Question
Consider the circuit shown in the figure below:
All the resistors are identical. The ratio is,
Choices
Choice (4)  Response  

a.  5 

b.  6 

c.  8 

d.  4 

Question number: 45
» Current Electricity » Electrical Energy and Power
Question
If the current through a resistor in a circuit increases by 4.5%, the power dissipated by the resistor,
Choices
Choice (4)  Response  

a.  Increases approximately by 4.5% 

b.  Increases approximately by 9% 

c.  Increases approximately by 0.66% 

d.  Decreases approximately by 9% 
