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 241: In a good thermos flask, the main cause of heat loss is? Options:
  A) conduction through the cork
  B) the plastic base of the thermos flask
  C) the silvered walls and shiny metals
  D) the outer cover or jacker
  Show Answer
  The correct answer is A .
• Question 242:
  

  Calculate the effective capacitance of the circuit in the diagram given

  Options:
  A) 4μf
  B) 3μf
  C) 2μf
  D) 1μf
  Show Answer
  The correct answer is D .
• Question 243:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors are 30V and 40V respectively. What is the voltage across the capacitor?

  Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 244: I Electrical potential, II Torque, III Kinetic Energy, IV Momentum. Which of the quantities listed are vectors? Options:
  A) II and IV
  B) I and II
  C) I and III
  D) II and III
  Show Answer
  The correct answer is A .
• Question 245:

  In a series R-L-C circuit at resonance, the voltages across the resistor and the inductors are 30V and 40V respectively. What is the voltage across the capacitor?

  Options:
  A) 30V
  B) 40V
  C) 50V
  D) 70V
  Show Answer
  The correct answer is B .
• Question 246: A stone of mass m kg is held h meters above the floor for 50s. The work done in joules over this period is Options:
  A) mh
  B) mgh
  C) $\frac{mgh}{50}$
  D) O
  Show Answer
  The correct answer is D .
• Question 247: The charge carriers in gasses are Options:
  A) ions only
  B) electrons and ions
  C) electrons and holes
  D) electrons only
  Show Answer
  The correct answer is A .
• Question 248:

  

  If a ray traveling in air is incident on a transparent medium as shown in the diagram, the refractive index of the medium is given as

  Options:
  A) $\frac{\cos \beta }{\sin \alpha }$
  B) $\frac{\cos \alpha }{\sin \beta }$
  C) $\frac{\sin \alpha }{\sin \beta }$
  D) $\frac{\sin \beta }{\sin \alpha }$
  Show Answer
  The correct answer is B .
• Question 249: what is likely to happen if the glass of a thermometer expands more upon heating than the liquid inside? Options:
  A) the glass will break
  B) the glass will shrink
  C) the liquid will rise up in the stem
  D) the liquid will go down in the stem
  Show Answer
  The correct answer is D .
• Question 250: A platinum resistance thermometer wire has a resistance of 70hms at 0°Cand 7.5 Ohms at 100°C. Calculate the temperature of the wire when the resistance is 7.2 Ohms Options:
  A) 15°C
  B) 40°C
  C) 20°C
  D) 10°C
  Show Answer
  The correct answer is B .