Gases conduct electricity under
high pressure & high voltage
low pressure & low voltage
normal pressure & low voltage
low pressure & high voltage
Correct answer is D
Gases conduct electricity under low pressure & high voltage
A man on a bench will exert the greatest pressure on the bench when he
lies flat on his back
lies flat on his belly
stands on both feet
stands on the toes of one foot
Correct answer is D
| P | = | F
A |
hence, pressure increases when the areas decreases.
0.795m
0.625m
0.335m
0.125m
Correct answer is A
n = 200, S = 132 rev/min, v = 350m/s2
| f | = | ns | = | 200 | × | 132 | rev
min |
× | 1min
60s |
= | 440Hz |
| λ | = | v
f |
= | 350
440 |
= | 0.795m |