KVPY Stream SBSX (Class 12 & 1st Year BSC) Physics: Questions 147  150 of 250
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Question number: 147
» Magnetic Effects of Current and Magnetism » Biot  Savart Law
Appeared in Year: 2015
Question
A wire bent in the shape of a regular n polygonal loop carries a steady current I. Let I be the perpendicular distance of a given segment and R be the distance of given segment and R be the distance of a vertex both from the centre of the loop. The magnitude of the magnetic field at the centre of the loop is given by.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 148
» Oscillations and Waves » Simple Pendulum
Question
The breaking strength of thread of a simple pendulum, whose bob has mass m, is 2 mg. What is the maximum angular amplitude that can be given to the pendulum?
Choices
Choice (4)  Response  

a.  52^{0} 

b.  60^{0} 

c.  48^{0} 

d.  40^{0} 

Question number: 149
» Kinematics » Motion in a Straight Line
Question
A 1.5 kg object travelling with uniform acceleration covers 16 m in 4^{th} second and 20 m in 5^{th} second. Which of the following is correct?
Choices
Choice (4)  Response  

a.  The force on the object is 6N. 

b.  The initial velocity of the object is 2 ms^{1} 

c.  The acceleration of the object is 4 ms^{2}. 

d.  All a. , b. and c. are correct 

Question number: 150
» Oscillations and Waves » Simple Pendulum
Question
The breaking strength of thread of a simple pendulum, whose bob has mass m, is 4 mg. What is the maximum angular amplitude that can be given to the pendulum?
Choices
Choice (4)  Response  

a.  45^{0 } 

b.  60^{0} 

c.  70^{0} 

d.  30^{0} 
