Yes , it will not only broad your scope but also will make you available for getting into two different fields. Both engineering course is a industrial based course but electrical engineers are required almost by most of companies and eventhough government sector have a great scope for electrical engineering. Instrumentation and control engineering is a developing engineering in India . So ,the new companies provide jobs to Instrumentation and control engineer. If you have both degree you might also have chances of  getting a great packages from beginning.

Hope it may help you