Answer:
Rate of change of magnetic field is  
         
Explanation:
We have given diameter of the circular loop is 13 cm = 0.13 m 
So radius of the circular loop 
Length of the circular loop 
Wire is made up of diameter of 2.6 mm
So radius 
Cross sectional area of wire 
Resistivity of wire 
Resistance of wire 
Current is given i = 11 A
So emf  
Emf induced in the coil is 


 
        
             
        
        
        
Mold
Explanation:
A mold is a cavity that is left behind in the rock after an organism hard part has been dissolved. These are important fossils that useful in relative dating. 
- Some hard parts of organism are preserved in form of molds in soft sediments. 
- The outline and important details of the hard part is preserved when the mold dissolves away. 
- Fossil molds are representative on the internal outline of the hard parts of organisms. 
- They are usually recognized as a part of body fossil in a section. 
learn more: 
Fossils brainly.com/question/7382392
#learnwithBrainly
 
        
             
        
        
        
The power equals energy divided by the time
P=E/t
P=1200/60
P=20W
Hope you get it!