Question

2. The speed of light in Vacuum is
निर्यात में प्रकाश की चाल होती है
(a) 3xio cms (3x10 सेटी मीटर/सेकेड)
(c) 3x10km/s(3x10 किलोमीटर/सेकेड)
3. The refractive index of water is.
जल का अपवर्तनांक है।
(a) 133
(b) 1.50
4. What is the commercial unit of electric Energy
विद्युत ऊर्जा का व्यावसायिक मात्रक क्या है?
(a) Wan (बाट)
(c) Kilowan-hour (किलाबाट-घंटा)​

Answer 1

Answer:

2. Speed of light in vacuum is 3 x 10^8 m/s

3. refractive index of water is nearly 1.33

4. the commercial unit of electrical energy is kilowatt hour

Answer 2

Explanation:

1. speed of light is 3×10^-8
2. The R.I of water is 1.3
3. The commercial unit of electric energy is kilowatt-hour