NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 725  729 of 2184
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Question number: 725
» Electromagnetic Induction & Alternating Currents » Faraday's Law
Question
A rectangular coil of size 10 cm x 20 cm has 60 turns. It is rotating about one of its diagonals in magnetic field 0.5 Wb/m ^{2} with a rate of 1800 revolution per minute. The induced e. m. f. in the coil can be,
(1) 111 V (2) 112 V
(3) 113 V (4) 114 V
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1,2 and 3 are correct 

b.  2 and 4 are correct 

c.  1 and 2 are correct 

d.  1 and 3 are correct 

Question number: 726
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
An alternating voltage is connected to a 1 µF capacitor through an ac ammeter. The reading of the ammeter will be
Choices
Choice (4)  Response  

a.  10 mA 

b.  20 mA 

c.  80 mA 

d.  40 mA 

Question number: 727
» Experimental Skills » Screw Gauge
Question
Three identical metal balls each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed, when centers of three balls are joined. The center of the mass of system is located at
Choices
Choice (4)  Response  

a.  Centre of one of the balls 

b.  Point of intersection of the medians 

c.  Line joining centers of any two balls 

d.  Horizontal surface 

Question number: 728
» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC
Question
The frequency of an alternating voltage is 50 cycles/sec and its amplitude is 120 V. Then the r. m. s value of voltage is
Choices
Choice (4)  Response  

a.  84.8V 

b.  101.3V 

c.  56.5V 

d.  70.7V 

Question number: 729
» Experimental Skills » Screw Gauge
Question
Four particles of masses m, 2m, 3m and 4m are arranged at the corners of a parallelogram with each side equal to a and one of the angle between two adjacent sides is 60°. The parallelogram lies in the xy plane with massm at the origin and 4m on the xaxis. The center of mass of the arrangement will be located at
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

