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 681: Two 50$\mu$F parallel plate capacitors are connected in series. The combined capacitor is then connected across a 100-V battery. The charge on each plate of the capacitor is Options:
  A) 5.00 x 10^-5C
  B) 2.50 x 10^-3C
  C) 1.25 x 10^-3C
  D) 1.00 x 10^-2C
  Show Answer
  The correct answer is B .
• Question 682: A coin is placed at the bottom of a cube of glass tern thick. If the refractive index of the glass is $\mu$, how high does the coin appear to be raised to an observer looking perpendicularly into the glass? Options:
  A) $\frac{1}{t-\mu }$
  B) $\frac{t(\mu -I)}{\mu }$
  C) t (1 + $\frac{1}{\mu }$)
  D) -$\mu$
  E) $\mu$t
  Show Answer
  The correct answer is B .
• Question 683:

  A certain radioactive source emits radiation that was found to be deflected by both magneticand electric fields. The radiation is?

  Options:
  A) beta rays
  B) gamma rays
  C) x-rays
  D) ultra-violet rays
  Show Answer
  The correct answer is A .
• Question 684:

  Which of these isa second-class lever?

  Options:
  A) sugar tongs
  B) claw hammer
  C) plier
  D) wheelbarrow
  Show Answer
  The correct answer is D .
• Question 685: Equal masses of copper and rubber are raised to the same temperature. After sometimes, the copper was observed to be at a lower temperature because Options:
  A) the specific heat capacity of copper is lower than that of rubber
  B) copper expands more than rubber
  C) the specific heat capacity of rubber is lower than that of copper
  D) rubber expands more than copper
  Show Answer
  The correct answer is A .
• Question 686:

  If an object whose mass is 3kg moves in a circular path of a radius of 0.7m, and records a speed at 2m/s, what is the result of the angular velocity?

  Options:
  A) 4 rads^–1
  B) 1 rads^–1
  C) 3 rads^–1
  D) 2 rads^–1
  Show Answer
  The correct answer is C .
• Question 687: Which of the following apparatus will require the smallest fuse rating for its protection? Options:
  A) 60W, 240V
  B) 60W, 40V
  C) 40W, 12V
  D) 40W, 5V
  Show Answer
  The correct answer is A .
• Question 688: One end of a long wire is fixed while a vibrator is attached to the other end. When the vibrator is energized, the types of waves generated in the wire are Options:
  A) stationary and longitudinal
  B) stationary and transverse
  C) progressive and transverse
  D) progressive and longitudinal
  Show Answer
  The correct answer is C .
• Question 689: A 40-W instrument has a resistance of 90$\mathrm{\Omega }$. On what voltage should it be operated normally? Options:
  A) 60V
  B) 150V
  C) 225V
  D) 3600V
  Show Answer
  The correct answer is A .
• Question 690: When an atom loses or gains a charge, it becomes an Options:
  A) ion
  B) an electron
  C) a neutron
  D) a proton
  E) a deuteron
  Show Answer
  The correct answer is A .