Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 1251: Calculate the position of an object placed in front of a convex mirror having focal length of 12 cm such that an image is formed 6 cm away from the mirror Options:
  A) 4. 0 cm
  B) 3. 0 cm
  C) 12.0 cm
  D) 9.0 cm
  Show Answer
  The correct answer is C .
• Question 1252: The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [$\pi$ = 3.142] Options:
  A) 50.0Hz
  B) 100.0Hz
  C) 311.0Hz
  D) 314.2Hz
  Show Answer
  The correct answer is A .
• Question 1253: A length of wire has a frequency of 255Hz when stretched by a force of b225N. If the fore increased to 324N, what is the new frequency of vibration Options:
  A) 306 Hz
  B) 512 Hz
  C) 488 Hz
  D) 356 Hz
  Show Answer
  The correct answer is A .
• Question 1254:

  What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?

  Options:
  A) N0.65
  B) N0.39
  C) N3.90
  D) N0.13
  Show Answer
  The correct answer is D .
• Question 1255: Every house supplied with electricity is provided with a box of fuses so that Options:
  A) the consumption of electricity can be recorded
  B) people residing in the house will not have an electric shock if they touch a live wire
  C) the total current drawn from the mains can be limited
  D) the voltage supply can be stabilized
  E) it serves as a standby supply when there is a power failure
  Show Answer
  The correct answer is C .
• Question 1256: In sunlight, a blue flower looks blue because we see the flower by the light it Options:
  A) recieves from our eye
  B) disperses
  C) absorbs
  D) refracts
  E) reflects
  Show Answer
  The correct answer is E .
• Question 1257: What will happen to the pressure of a gas if its temperature is reduced to -273^oC? Options:
  A) It will decrease
  B) it will drop to zero
  C) It will increase
  D) It will remain constant
  Show Answer
  The correct answer is B .
• Question 1258:

  

  In the a.c circuit above, the current value is

  Options:
  A) 0.58 A
  B) 3.00 A
  C) 4.00 A
  D) 6.67 A
  Show Answer
  The correct answer is C .
• Question 1259: Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is Options:
  A) 23.9°
  B) 26.6°
  C) 29.5°
  D) 60.0°
  E) 63.4°
  Show Answer
  The correct answer is B .
• Question 1260: The accurate measurement of the relative density of a substance in its powdered form is done with a beam balance and Options:
  A) a density bottle
  B) an eureka can
  C) a pipette
  D) a burette
  Show Answer
  The correct answer is A .