Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
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
The pin-hole camera produces a less sharply defined image when the
pin-hole is larger
illumination is less
screen is further from the pin-hole
object is further from the pin-hole
Correct answer is A
- a less sharp or blurred image is due to increased brightness
- increase brightness is also due to large hole or many pin holes