AKUEB - Physics X - Sample Test

1. A metallic bob of simple pendulum is replaced by another bob of glass of same dimensions, the time period of the simple pendulum will be: SLO # 12.1.13 a) Doubled b) One -fourth c) Half d) Remain the same

2. When a ray of light enters from rarer medium to denser medium then: SLO # 14.4.1 a) It bends toward the normal b) It bends away from the normal c) Will pass through without any change in direction d) It will reflect back

3. When two capacitors are of 6 micro farad and 12 micro farad are connected in series with a battery of 12 volts, then the charge stored in each capacitor will be: SLO # 15.5.2 a) 4 coulomb b) 48 micro coulomb c) 4.8 coulomb d) 4 micro coulomb

4. The function of mains transformer is to convert: SLO # 17.5.4 a) One direct voltage to another direct voltage of different magnitude b) One alternating voltage to another alternating voltage of different magnitude c) A high voltage alternating voltage to a low value direct ; voltage d) A low value direct voltage to high value direct voltage

5. The characteristic of musical sound which depends upon frequency is: SLO # 13.1.6 a) Pitch b) Quality c) Loudness d) All are correct

6. A convex lens forms a real image three times as big as 32; an object which is placed at 20 cm from the lens then the focal length of the lens will be: SLO # 14.7.2 a) 5 cm b) 15 cm c) 20 cm d) 1.5 cm

7. Which of the following statement is correct: SLO # 12.2.2 a) Sound waves are transverse in nature b) Water waves are Longitudinal in nature c) Sound waves are ; compressional waves d) X-rays from compressions and rarefactions

8. A dolphin emits ultrasonic waves of frequency 150 Kilo Hz, the speed of ultra-sonic wave in water is 1500 m/sec the wave length in water will be: SLO # 12.2.1 & 13.3.1 a) 0.0001 m b) 0.01m c) 0.1 m d) 10 m

9. If the power of a convex lens is 2 32; diopter then it focal length will be: SLO # 14.7.3 a) 50 cm b) 0.5 cm c) 200 cm d) 1 m

10. An electrical instrument ; which is always connected in series in electrical circuits is: SLO # 16.5.1 a) Galvanometer b) Voltmeter c) Ammeter d) All of these

11. If 2 ; joule of energy is required to transfer one coulomb of charge from one point ; to another, the potential difference between these points will be: SLO # 16.2.1 a) 0.5 Volt b) 1 Volt c) 2 Volt d) 2.5 Volt

12. To produce N-type crystal, Germanium or Silicon may be doped with a substance that is: SLO # 19.2.1 a) Di- Valent b) Tri- Valent c) Tetra- Valent d) Penta- Valent

13. The method that is used to communicate 32; information to far off places instantly is called: SLO # 20.2.1 a) Television b) Information c) Communication d) Telecommunication

14. Snell's Law defines: SLO # 14.4.1 a) Path of a ray of light b) Frequency of light c) Nature of light rays d) Refractive index of a medium

15. If the length of a copper wire 1m and its diameter is 2 mm then its resistance will be: SLO # 16.4.1 a) 6.7 m Ohm b) 3.5 m Ohm c) 5.4 m Ohm d) 2 Ohm

16. The number of magnetic lines of 32; force passing through the unit area of a surface are known as: SLO # 17.1.1 a) Magnetic field b) Electro-motive force c) Magnetic flux d) Potential difference

17. The distance between two point charges is 2m, if the distance is reduced to 10 cm then the electrostatic force would become: SLO # 15.3.3 a) Half b) Two times c) Four times d) None

18. Which elements are naturally unstable: SLO # 18.2.4 a) Having atomic number greater than 72 b) Having atomic number less than 82 c) Having atomic number greater than 82 d) Having atomic number less than 72

19. The discovery of radioactivity is related to: SLO # 18.2.1 a) Henry Bequerral b) Strassmann c) Michael Faraday d) Neil Bohr

20. P N junction diode is used as a half wave rectifier, the nature of 32; biasing is: SLO # 19.2.5 a) Forward 32; biasing b) Reverse 32; biasing c) Neutral 32; biasing d) Normal biasing

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