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 1151:

  

  In a given circuit, the cell P has an emf 1.5V and an unknown internal resistance while cell Q has an emf 2.0V and an internal resistance of 1 ohm if the ammeter reads 50m A, Then r is equal to

  Options:
  A) 0.5 ohm
  B) 0.62 ohm
  C) 1.0 ohm
  D) 2.0 ohm
  E) 3.0 ohm
  Show Answer
  The correct answer is D .
• Question 1152: The primary coil of a transformer has N turns and is connected to a 120 V a.c. power line. If the secondary coils has 1 000 turns and a terminal voltage of 1 200 volts, what is the value of N? Options:
  A) 120
  B) 100
  C) 1 000
  D) 1 200
  Show Answer
  The correct answer is B .
• Question 1153: An electric heater with a p.d of 240 V connected across its terminals has a total resistance of 960Ω. find the power rating of the heater. Options:
  A) 0.25 W
  B) 4.00 W
  C) 38.40W
  D) 60.00W
  Show Answer
  The correct answer is D .
• Question 1154: Any line or section through an advancing wave in which all the particles are in the same phase is called the Options:
  A) wave lenght
  B) wave crest
  C) wave trough
  D) wave amplitude
  E) wave front
  Show Answer
  The correct answer is E .
• Question 1155:

  A microscope is focused on a mark on a table, when the mark is covered by a plate of glass 2m thick, the microscope has to be raised 0.67cm for the mark to be once more in focus. Calculate the refractive index.

  Options:
  A) 1.52
  B) 1.68
  C) 2.58
  D) 1.82
  Show Answer
  The correct answer is A .
• Question 1156:

  I. Density of the liquid.

  II. Acceleration due to gravity.

  III. Type of container of the liquid.

  IV. The constituents of the liquid.

  Which of the above conditions will NOT affect the pressure of fluid?

  Options:
  A) I and III only
  B) II and III only
  C) III and IV only
  D) I and II only
  Show Answer
  The correct answer is C .
• Question 1157:

  In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6$\mathrm{\Omega }$ is connected to the other end of the wire. Determine the value of the unknown resistance

  Options:
  A) 3.2$\mathrm{\Omega }$
  B) 1.4$\mathrm{\Omega }$
  C) 3.21$\mathrm{\Omega }$
  D) 1.2$\mathrm{\Omega }$
  Show Answer
  The correct answer is D .
• Question 1158: The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a Options:
  A) concave mirror of focal length 5cm
  B) concave mirror of focal length 10cm
  C) convex mirror of focal length 5cm
  D) convex mirror of focal length 20cm
  Show Answer
  The correct answer is A .
• Question 1159: A galvanometer of internal resistance 50$\mathrm{\Omega }$ has a full scale deflection for a current of 5mA. What is the resistance required to covert it to a voltmeter with full scale deflection of 10V? Options:
  A) 1750$\mathrm{\Omega }$
  B) 1950$\mathrm{\Omega }$
  C) 2000$\mathrm{\Omega }$
  D) 2500$\mathrm{\Omega }$
  Show Answer
  The correct answer is B .
• Question 1160:

  

  The diagram above shows two wave forms P and Q at a particular instant in time. the two waves will interface

  Options:
  A) destructively to produce a wave of larger amplitude
  B) destructively to produce a wave of smaller amplitude
  C) constructively to produce a wave of larger amplitude
  D) constructively to produce a wave of smaller amplitude
  Show Answer
  The correct answer is C .