Physics Past Questions And Answers

Note: You Can Select Post UTME Schools Name Below The Exam Year.
821

In a wheel and axle mechanism the diameters of the wheel and axle are 40cm and 8cm respectively. Given that the machine is 80% efficient, what effort is required to lift a load of 100N?

  • A. 20N
  • B. 25N
  • C. 50N
  • D. 80N
View Discussion (0)JAMB 1998
822

A transistor function mainly as a

  • A. switch and amplifier
  • B. rectifier and an amplifier
  • C. charge storer and an amplifier
  • D. charge storer and a switch
View Discussion (0)JAMB 2001
823

The sound heard by a person after the reflection of the sound generated by him is called

  • A. reverberation
  • B. resonance
  • C. echo
  • D. audibility
View Discussion (0)WAEC 2012 OBJ
824

A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2ms-2. The time required to bring the train to a complete halt is

  • A. 40s
  • B. 10s
  • C. 20s
  • D. 5s
View Discussion (0)JAMB 2016
825

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

  • A) 306 Hz
  • B) 512 Hz
  • C) 488 Hz
  • D) 356 Hz
View Discussion (0)JAMB 2011
826

Which of the following actions will increase capacitance of a parallel plate capacitor?

I. Decreasing the distance between the plates

II. Increasing the distance between the plates.

III. Increasing the area of the plates overlap.

IV. Avoiding the use of dielectric between the plate

  • A. I and III only
  • B. II and III only
  • C. I and IV
  • D. . III and IV only
View Discussion (0)WAEC 2021 OBJ
827

A vapour is said to be saturated when

  • A) a dynamic equilibrium exists between liquid molecules and the vapour molecules
  • B) a dynamic aquilibrium exists such that more molecules return to the liquid than are living it
  • C) the temperature of the vapour varies
  • D) the vapour pressure is atmospheric
View Discussion (0)JAMB 2010
828

Before starting a journey, the tyre pressure of a car was 3 x 105Nm-2 at 27oC. At the end of the journey, the pressure rose to 4 x 105Nm-2. Calculate the temperature of the tyre after the journey, assuming the volume is constant

  • A. 400oC
  • B. 300oC
  • C. 273oC
  • D. 127oC
View Discussion (0)JAMB 1997
829

Explain plane polarized light

View Discussion (0)WAEC 2008 THEORY
830

Two capacitors, each of capacitance 2\(\mu\)F are connected in parallel. If the p.d across them is 120V, calculate the charge on each capacitor

  • A. 6.0 x 10-5C
  • B. 1.2 x 10-4C
  • C. 2.4 x 10-4C
  • D. 4.8 x 10-4C
View Discussion (0)WAEC 2012 OBJ