Waec Physics 2013 Past Questions and Answers

Question 46:

• WAEC 2013

The diagram above illustrates a waveform. Which of the point on the waveform are in phase?

A. P and R
B. R and T
C. P and T
D. Q and S

Question 47:

• WAEC 2013

An electric circuit is connected as illustrated above. Determine the equivalent e.m.f and current flowing through the circuit respectively, neglecting the internal resistance of the cells

A. 2V, 1.0A
B. 2V, 4.0A
C. 6V, 0.3a
D. 6V, 3.0a

Question 48:

• WAEC 2013

A projectile is released with a speed u at an angle \(\theta\) to the horizontal. With the aid of a diagram, show that the time of flight is equal to \(\frac{2uSin\theta}{g}\), where g is the acceleration of free fall.

Question 49:

• WAEC 2013

The horizontal component of the initial speed of a particle projected at 30° to the horizontal is 50 ms\(^{-1}\). If the acceleration cf free fall due to gravity is 10ms\(^{-2}\), determine its: (a) initial speed; (b) speed at maximum height reached.

Question 50:

• WAEC 2013

In an electrolysis experiment, the ammeter records a steady current of 1 A. The mass of copper deposited in 30 minutes is 0.66 g. Calculate the error in the ammeter reading. [Electrochemical equivalent of copper = 0.00033 g C\(^{-1}\)]