- 1. The form of energy referred to as electromagnetic radiation because it is composed of both electric and magnetic field is called_____________
A) Light energy
B) Magnetic energy
C) Electrical energy
D) Mechanical energy
- 2. ______________ occurs when incident Ray's of light which strike the surface of a body or object are sent back.
A) Refraction of light.
B) Reflection of light
C) Redirection of light
D) Retaliation of light
- 3. One of these is a type of reflection.
A) All of the above
B) Straight reflection
C) Scattered reflection
D) Angular reflection
- 4. When parallel Ray of light fall on a smooth surface it is called_______________
A) Irregular reflection
B) Diffussed reflection
C) Regular reflection
D) Non of the above
- 5. _________ is a stone like iron rich material which has the natural ability to attract other small piece of certain metals.
A) Gold
B) Aluminum
C) Diamond
D) Lodestone
- 6. Like poles of magnet repel one another while unlike poles attract one another.
A) Non of the above
B) False
C) True
D) I don't know
- 7. Which of the following is an application of magnetic field in technology.
A) Running
B) Gun
C) Loud speaker
D) Coding
- 8. Magnet consist of how many poles?
A) 2
B) 1
C) 3
D) 4
- 9. ______________ is any object that produces an inevitable area of magnetism all around it.
A.
A) Conductor
B) Attraction
C) Magnet
D) Adhesive C.
- 10. ___________ is the region of space around a magnet where magnetic effect can be field.
A) Electromagnetic field
B) Electric field
C) Al-Ameen field
D) Magnetic field
- 11. What is the wavelength of the sound wave generated from a drum vibrating at a frequency of 150hz in air? Assume V for sound = 330m/s.
A) 49.500m/s
B) 2.2m/s
C) 480m/s
D) 80m/s
- 12. The velocity, frequency and wavelength of sound wave are connected by the formula.
A) W= FD
B) F= MA
C) Non of the above
D) V=fΠ
- 13. ______________ is a form of energy generated by a vibrating body.
A) Music
B) Beat
C) Sound
D) Tone
- 14. Reflection of sound from aplain surface give rise to _____________
A) Noise
B) Rays
C) Echo
D) Vibration
- 15. ______________ is the persistent of sound after the source stop.
A) Recreation
B) Repetition
C) Reverberation
D) Reflection
- 16. Electricity can be produced in two ways namely.
A) Current and obsolete
B) Good and bad
C) Positive and negative
D) Natural and artificial
- 17. Which of these is not an example of radioactive elements
?
A) Radium
B) Davinium
C) Polonium
D) Uranium
- 18. _____________ is defined as the spontaneous disintegration of radioactive elements with the emission of alpha, beta and gamma Ray resulting in release of energy.
A) Scintillation
B) Decay
C) Diffussion
D) Radioactivity
- 19. Radiation can be detected through the following devices except
A) Photographic plate
B) Geiger-muller tube
C) Microscope
D) Decaton counter
- 20. Echo can be used to determine __________
A) Direction of moving car
B) Speed of a ship
C) Velocity of sound in air
D) All of the above
|