A/L 2001 Physics MCQ - Questions 1 - 10

1. eV (electron-volt) is a unit of
1. (1) power
2. (2) energy
3. (3) charge
4. (4) voltage
5. (5) potential difference
6. Answer with explanation
2. A sound with intensity 10^-12 W m^-2 is defined to have an intensity level of 0 decibels. The intensity level of a sound of intensity 10^-8 W m^-2 is
1. (1) -40 dB
2. (2) 20 dB
3. (3) 40 dB
4. (4) 60 dB
5. (5) 80 dB
6. Answer with explanation
3. Two particles A and B have equal momenta, but the velocity of the particle B is four times that of A.
   
   The ratio  is
1. (1) 
2. (2) 
3. (3) 1
4. (4) 2
5. (5) 4
6. Answer with explanation
4. A
   
   uniform circular plate of radius 2R has a circular hole of radius R cut out of it as shown is the figure. The center of gravity of the plate with the hole is most likely to be found at,
1. (1) A
2. (2) B
3. (3) C
4. (4) D
5. (5) E
6. Answer with explanation
5. Consider the following statements made about infrared, ultraviolet, X-rays, radio waves and gamma rays.
1. (A) All of them are electromagnetic waves
2. (B) All of them travel with the same speed in the free space
3. (C) Radio waves have the longest wavelength
4. Of the above statements
5. 
   
6. (1) only (A) is true
7. (2) only (A) and (B) are true
8. (3) only (A) and (C) are true
9. (4) only (B) and (C) are true
10. (5) all (A), (B) and (C) are true
11. Answer with explanation
6. The mercury column rises in mercury-in-glass thermometer when the temperature is raised. The most appropriate reason for this is
1. (1) mercury is a good conductor of heat
2. (2) glass is a poor conductor of heat
3. (3) glass expands when heated
4. (4) glass expands less than mercury when heated
5. (5) mercury expands uniformly with rise in temperature
6. Answer with explanation
7. The electrical energy stored in a 1 µF capacitor connected across a 2 V cell is
1. (1) 5 x 10^-7 J
2. (2) 1 x 10^-6 J
3. (3) 2 x 10^-6 J
4. (4) 4 x 10^-6 J
5. (5) 6 x 10^-6 J
6. Answer with explanation
8. The mass and radius of the earth is M and R respectively. The escape velocity of a rocket of mass m on the earth surface is
1. (1) 
2. (2) 
3. (3) 
4. (4) 
5. (5)
6. Answer with explanation
9. A
   
   proton is fired at an atomic nucleus (X). Which one of the paths shown in the diagram is not possible for the proton?
1. (1) P
2. (2) Q
3. (3) R
4. (4) S
5. (5) T
6. Answer with explanation
10. The
    
    gate shown in the figure is equivalent to
1. (1)
2. (2)
3. (3)
4. (4)
5. (5)
6. Answer with explanation

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A/L 2001 Physics MCQs: 1 - 10 | 11 - 20 | 21 - 30 | 31 - 40 | 41 - 50 | 51 - 60