It's important to know that diffraction gratings can be identified by the number of lines they have per centimeter. Often, more lines per centimeter is more useful because the images separation is greater when this happens. That is, the distance between lines increases.
<h2>Therefore, the answer is 2.</h2>
 
        
             
        
        
        
instantaneous speed of the car
 
        
             
        
        
        
Answer:
The answer you have selected is correct.
Explanation:
Increase radius, force of gravity decreases 
 
        
             
        
        
        
Explanation:
It is given that,
Diameter of the circular loop, d = 1.5 cm 
Radius of the circular loop, r = 0.0075 m
Magnetic field, 
(A) We need to find the current in the loop. The magnetic field in a circular loop is given by :



I = 32.22 A
(b) The magnetic field on a current carrying wire is given by :



r = 0.00238 m

Hence, this is the required solution.