A step up transformer has a ratio of one to ten.
													
																	A step up transformer has a ratio of one to ten. 
									
	
		
	
																	What we have here is a device that steps the voltage down by a factor of ten and current up by a factor of ten. 
																	2 volts is fed to the primary. 
																	Neglecting slight losses if 100 w of power go into the primary coil the power coming from the secondary coil is. 
																	A step up transformer has turn ratio 10. 
															
													
									
	
		
	
																	This is a very useful device indeed. 
																	By faraday s law of induction. 
																	What are step up and step down transformers. 
																	A step up transformer has a turn ratio of 10. 
															
													
									
	
		
	
																	Secondary voltage ratio and 1 10 primary. 
																	A cell of e m f. 
																	A cell of emf 2 volts is fed to the primary. 
																	Secondary voltage developped is a 20 v b 10 v. 
															
													
									
	
		
	
																	2 where is the instantaneous voltage is the number of turns in a winding dφ dt is the derivative of the magnetic flux φ through one turn of the winding over time t and subscripts p and s denotes primary and secondary. 
																	Combining the ratio of eq. 
																	A secondary voltage developed is.