| Science (Practice Test-2) |
1. An object kept in between two plane mirrors inclined at an angle 60°. Find the number of images formed.
- 4
- 3
- 7
- 5
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 3 [/su_spoiler]
2. Focal length of a convey lens is 50 cm. Find its power-
- +1/50 D
- +2 D
- -1/50 D
- -2 D
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] +2 D [/su_spoiler]
3. Find the value of equivalent resistance between A and B.
- r
- 2r
- 3r
- 3/2r
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] r [/su_spoiler]
4. A object kept infront of a concave mirror at 30 cm from the mirror forms its image at 40 cm behind the mirror. Focal length of mirror is-
- 120 cm
- 70 cm
- 10 cm
- 17.1 cm
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 17.1 cm [/su_spoiler]
5. A 100m long telephone wire carries 0.1 A current when a battery of 12 v is connected across its ends. Find its resistance per meter.
- 120 Ω
- 12 Ω
- 0.12 Ω
- 1.2 Ω
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 1.2 Ω [/su_spoiler]
6. An electric bulb is rated at 220 v – 100 W. Find the resistance of its filament.
- 220 Ω
- 100 Ω
- 200 Ω
- 150 Ω
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 100 Ω [/su_spoiler]
7. The mass of a man on earth is 70 Kg. What is his mass on the moon?
- 35 kg
- 70 kg
- 116.6 kg
- 11.66 kg
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] 11.66 kg [/su_spoiler]
8. Which of the following is natural plastic?
- Teflon
- PVC
- Lac
- Bakelite
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Lac [/su_spoiler]
9. Purification of copper is done by-
- Electrorefining
- Zone-refining
- Vaur-orchel
- None
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Electrorefining [/su_spoiler]
10. Which of the following is a liquified mixture of normal Butane and ISO Butane?
- Coal Gas
- Petrol Gas
- Liquified petroleum gas
- Water Gas
[su_spoiler title=”Answer” style=”fancy” icon=”caret”] Liquified petroleum gas [/su_spoiler]