Currently, petrol is retailing at Rs - a litre in Delhi, and diesel is priced at Rs 87.62. In Mumbai, Chennai and Kolkata petrol costs Rs -, Rs - and Rs - respectively. On the other hand, diesel is ...

Concerned about fluctuating fuel costs? Confused by mpg claims? Our free calculator helps you work out what you're paying and choose the right engine for your next car. Dino BurattiResearcher & writer ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...