Vaishnavy, careers in a core sector is not only challenging, but with the rise in competition for good engineers, it is rewarding as well. It is a myth that corporations do not prefer women engineers.

Though a  bias did exisit in early 60s or 70s ( remember the story about Sudha murthy, who was intially rejected by Tata Motors?), it no longer applies. With the war for talent hotting up, corporations do not give any weight to to your gender.

In fact with the increasing awareness about inclusivity, they go out of the way to increase the number of women in their technical workforce. All they would look for is, whether you are capable of working under streneous conditions, especially in heavy electrical industries. Electronics sector does not have the same level of physical rigour. So go ahead and apply.