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 891: Light of frequency 6.0 x 10¹⁴ Hz travelling in air is transmitted through glass or refractive index 1.5. Calculate the frequency of the light in the glass Options:
  A) 4.0 x 10¹⁴Hz
  B) 6.0 x 10¹⁴Hz
  C) 7.5 x 10¹⁴Hz
  D) 9.0 x 10¹⁴Hz
  Show Answer
  The correct answer is A .
• Question 892: A structural engineer stood on a top of a building releasing a light and heavy object to the ground which of the following statement is true?(Neglect Air Resistance) Options:
  A) Bothe light and heavy subject reach the ground at the same time
  B) he light object get to the ground first before the heavy object
  C) he heavy object to the ground first before the light object
  D) None get to the ground first
  Show Answer
  The correct answer is A .
• Question 893: If a current carrying coil is mounted on a metal frame, the back e.m.f. induced in the coil causes Options:
  A) inductance
  B) eddy currents
  C) elecro-magnetism
  D) dipole moment
  Show Answer
  The correct answer is B .
• Question 894:

  A substance has half of 3 min. After 6 min, the count rate was observed to be 400. What was its count rate at zero time?

  Options:
  A) 1600
  B) 1200
  C) 200
  D) 2400
  Show Answer
  The correct answer is A .
• Question 895:

  I. Its velocity is constant

  II. No work is done on the body

  III. It has constant acceleration directed away from the centre

  IV. The centripetal force is directed towards the centreWhich combination of the above is true of a body moving with constant speed in a circular track?

  Options:
  A) II and IV
  B) I and IV
  C) II and III
  D) I and III
  Show Answer
  The correct answer is A .
• Question 896: The gravitational field intensity at a location X, in space, is two-fifths of its value on the earth’s surface. If the weight of an object at X is 4.80N. what is its weight on the earth? Options:
  A) 1.92N
  B) 2.88N
  C) 6.72N
  D) 8.00N
  E) 12.00N
  Show Answer
  The correct answer is E .
• Question 897: Which of the following statements is correct about light and sound waves? Both Options:
  A) are longitudinal waves
  B) are transverse waves
  C) have the same velocity in air
  D) need a medium for propagation
  E) transmit energy
  Show Answer
  The correct answer is E .
• Question 898:

  

  A block of mass m is held in equilibrium against a vertical wall by a horizontal force. If the coefficient of friction between the wall and the block is µ, the minimum value of the horizontal force is

  Options:
  A) µmg
  B) (1-µ)mg
  C) (1+µ)mg
  D) mg/µ
  Show Answer
  The correct answer is D .
• Question 899:

  If the frequency of an emitted x-ray is 1.6 x 10${}^{16}$Hz, the accelerating potential is?

  [e = 1.6 x 10${}^{-19}$J, h = 6.63 x 10-${}^{34}$Js]

  Options:
  A) 6630.0V
  B) 663.0V
  C) 66.3V
  D) 6.6V
  Show Answer
  The correct answer is C .
• Question 900: The plane mirrors in a kaleidoscope are usually placed Options:
  A) at an angle of 60^o
  B) parallel to one another
  C) perpendicular to one another
  D) at an angle of 45^o
  Show Answer
  The correct answer is A .