21. 

Who co-founded Hotmail in 1996 and then sold the company to Microsoft?

A. Shawn Fanning
B. ऐडा बायरन लोवेलास
C. सबीर भाटिया
D. रे टॉमलिंसन

22. 

The electromagnetic coils on the neck of the picture tube or tubes which pull the electron beam from side to side and up and down are called a...?

A. Transformer
B. घोड़े का अंसबंध
C. संधारित्र
D. डायोड

23. 

In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen. That voltage is about...?

A. 500 volts
B. 5 हजार वोल्ट
C. 25 हजार वोल्ट
D. 100 हजार वोल्ट

24. 

In the United States the television broadcast standard is...?

A. PAL
B.

न टी यस सी 

C.

सेकम 

D.

आरजीबी


25. 

Which consists of two plates separated by a dielectric and can store a charge?

A. Inductor
B. संधारित्र
C. ट्रांजिस्टर
D. रिले