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A female's lifetime supply of primary oocytes is established before birth and typically ranges from about 1 to 2 million at birth. However, this number declines significantly during childhood and puberty, with only around 400,000 to 500,000 primary oocytes remaining at the onset of menstruation. Ultimately, only about 400 to 500 of these oocytes will mature and be ovulated throughout a woman's reproductive years. The rest undergo a natural process of atresia, where they degenerate and are reabsorbed by the body.

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1w ago

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Why don't we supply to DC to the transformer?

When we give d.c supply to a transformer the primary winding will burn because constent flux will be will be produced which doesnt link with secondary so max current will circulate on primary winding only


What is the amount of primary current needed to supply the first secondary winding?

To determine the amount of primary current needed to supply the first secondary winding, you would typically use the transformer equation, which relates primary and secondary voltages and currents. The equation is ( V_p / V_s = I_s / I_p ), where ( V_p ) and ( V_s ) are the primary and secondary voltages, and ( I_p ) and ( I_s ) are the primary and secondary currents, respectively. By rearranging this equation, you can solve for the primary current ( I_p ) needed to supply the secondary winding based on the known values of the transformer’s voltages and the secondary current. Additionally, efficiency and losses in the transformer should be considered when calculating the actual primary current required.


Where should a service valve be located in order to isolate the hot supply from the hot water storage vessel to the taps?

primary flow


What is primary air supply?

Primary air supply refers to the initial flow of air introduced into a combustion system, such as a furnace or boiler, to support the combustion of fuel. This air is essential for maintaining the proper fuel-to-air ratio, ensuring efficient and complete combustion. In many systems, primary air is mixed with the fuel before ignition, contributing to the overall combustion process and affecting emissions and energy efficiency. Proper management of primary air supply is crucial for optimal performance and environmental compliance.


How do transformers de-energize?

'De-energise' simply means to 'disconnect' or to 'switch off. When you switch off the supply to a transformer's primary winding, it de-energises.