At J, the wire becomes plastic
J is the yield point
L is the elastic limit
At K, the wire breaks
Correct answer is B
- I is the elastic limit
- the end of the constant part J is the yield point
- L is the break point.
Aluminium is sometimes used as the leaf of an electroscope because it
is a light material
is a good conductor
is a good insulator
can be converted into thin sheets
Correct answer is D
- Aluminium can be made in thin sheet like Gold.
- the leaf is a thin material that can be diverged easily.
Upward
North
South
West
Correct answer is D
At a point due N of the wire, the field is due west, at a point due S of the wire, the field is due eest.
400
300
200
150
Correct answer is C
P = 0.45cm, L = 60cm, Eff = 75/π%
| VR | (Screw | system) | = | 2πr
P |
= | 2πL
P |
| M.A | = | Eff% × VR
100 |
= | 75
π |
× | 1
100 |
× | 2π × 60
0.45 |
= | 75 × 800
300 |
= | 200 |
0.46N
0.35N
0.36N
0,24N
Correct answer is C
F = BIL = 0.4 x 6 x \(\frac{15}{100}\)
= 0.36N
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Aptitude Tests