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waec-physics-2020

6 followers

48 questions


Which of the following statements about photoelectrons is&nb...
Which of the following statements about photoelectrons is correct? A. A faint green light produces photoelectrons with less kin...
2 months ago 1 answer(s) 2 votes


An electron of mass m and charge e moves in a circular path ...
An electron of mass m and charge e moves in a circular path in a magnetic field of flux density B. How long does it take to complete one orbit? A. 2m...
2 months ago 1 answer(s) 2 votes


Which of the following statements about the motion of a simp...
Which of the following statements about the motion of a simple pendulum is true? A. It is a simple harmonic motion when the angle of displacement is ...
2 months ago 1 answer(s) 2 votes


The temperature of an object is raised by 120°C. The res...
The temperature of an object is raised by 120°C. The resulting increase in its absolute temperature is A. 50K B. 120K C. 200K...
2 months ago 2 answer(s) 2 votes


A motorcycle starting from rest, is uniformly accelerated su...
A motorcycle starting from rest, is uniformly accelerated such that its velocity in 10s is 72kmhr-1. What is its acceleration? A. 108ms
2 months ago 1 answer(s) 2 votes


Which of the following statements about viscousity is n...
Which of the following statements about viscousity is not true? It A. depends on areas of the surface in contact B. occ...
2 months ago 1 answer(s) 2 votes


The magnitude of the force experienced by a charge of 1.6x10...
The magnitude of the force experienced by a charge of 1.6x10-8C in a uniform electric field of intensity 5x105NC-1 is
2 months ago 1 answer(s) 2 votes


What factor determine the frequency of a note emitted by a v...
what factor determine the frequency of a note emitted by a vibrating string? A. Amplitude of vibration, force constant of string and length of string...
2 months ago 1 answer(s) 2 votes


A 500N box rests on a horizontal floor. A constant horizonta...
A 500N box rests on a horizontal floor. A constant horizontal force is exerted on the box so that it moves through 8m. If the coefficient of kinetic friction...
2 months ago 1 answer(s) 3 votes


The velocity of sound in air at 15°C is 340ms-1. Calcula...
The velocity of sound in air at 15°C is 340ms-1. Calculate the velocity at 47°C A. 790ms-1 B. 602ms-1
2 months ago 1 answer(s) 2 votes