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NECO SSCE Physics 2005 past questions and answers

This 2005 NECO SSCE Physics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2005 set with instant marking.

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Sample NECO SSCE Physics 2005 questions

1. A wave has frequency 12 Hz and wavelength 0.50 m. What is its speed?
  1. 6.0 m/s
  2. 12 m/s
  3. 24 m/s
  4. 0.042 m/s

Answer: A. 6.0 m/s

Wave speed v = fλ = 12 × 0.50 = 6.0 m/s.

2. An echo is heard 0.80 s after a sound is made. If the speed of sound is 340 m/s, how far away is the reflecting wall?
  1. 68 m
  2. 136 m
  3. 272 m
  4. 425 m

Answer: B. 136 m

The sound travels to the wall and back, so distance = 340 × 0.80 ÷ 2 = 136 m.

3. An object is placed 30 cm from a converging lens of focal length 10 cm. How far from the lens is the image formed?
  1. 7.5 cm
  2. 10 cm
  3. 15 cm
  4. 30 cm

Answer: C. 15 cm

Using 1/f = 1/u + 1/v gives 1/v = 1/10 − 1/30 = 1/15, so v = 15 cm.

4. A ray of light enters glass from air and bends towards the normal. Which quantity decreases at the boundary?
  1. Frequency
  2. Energy
  3. Direction of the normal
  4. Wavelength

Answer: D. Wavelength

Light frequency remains unchanged while its speed and wavelength decrease in glass.

5. Two point charges of 2 μC and 3 μC are separated by 0.30 m in air. Taking k = 9.0 × 10^9 N m^2 C^-2, what is the magnitude of their force?
  1. 0.60 N
  2. 0.20 N
  3. 6.0 N
  4. 0.0060 N

Answer: A. 0.60 N

Coulomb's law gives F = kq1q2/r^2 = (9.0 × 10^9)(2 × 10^-6)(3 × 10^-6)/(0.30)^2 = 0.60 N.

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