One newton × One meter equals?
One water
One Joule
One ampere
One kilogram
Correct answer is B
1N × 1m = 1Nm = 1 Joul (F × d = Work/Energy)
2 m/s
4 m/s
8 m/s
12 m/s
Correct answer is C
| v | = | d
t |
or | v | α | d |
d = x, v = 4m/s
d = 2x, v = ? (girl & image)
| v | = | 2 × 4
x |
= | 8 | m
s |
1.6cm
16.0cm
20.0cm
25.0cm
Correct answer is D
Devices with different liquids
d\(_1\)h\(_1\) = d\(_2\)h\(_2\)
1 × 20 = 0.8 × h
| h | = | 20
0.8 |
= | 25cm |
In semi-conductor, the carriers of current at room temperature are
electrons only
electrons and holes
holes only
electron and ions
Correct answer is B
Electron and holes represents the negative and positive charge respectively.
5W
6W
7W
8W
Correct answer is A
I = 1A, F = 800 cycles/s = 800Hz
R = 5Ω, L = 2.5mH
P = I\(^2\)R = I\(^2\) × 5 = 5W