Which instrument converts mechanical energy to electrical energy?
a) Electric motor
b) Generator
c) Iron
d) Oven (more…)
What does the term solstice mean?
a) longest day of the year
b) shortest day of the year
c) equal day and night
d) both a and b (more…)
What does equinox mean in science?
a) longest day of the year
b) shortest day of the year
c) equal day and night
d) none of these (more…)
Who invented first touch screen mobile phone in 1992?
a) IBM
b) Microsoft
c) Samsung
d) Nokia (more…)
Who invented the first mobile (cell) phones?
a) Grahm Bell
b) Alexander Flemin
c) Martin Cooper
d) Joseph Swan (more…)
- Go to the previous page
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- …
- 30
- Go to the next page