2005 - WAEC Physics Past Questions and Answers - page 4
In which of the following media is the transmission of sound wave fastest?
The ability of a material to store an electric charge when its plates are at different potentials is referred to as its
Two capacitors if capacitance 0.4(\mu F) and 0.5(\mu F) are connected in parallel and charged to a p.d. of 50V, Determine the total charge acquired
A parallel plate capacitor of capacitance 600(\mu F) has a potential difference of 200V between its plates. Calculate the charge on either plate of the capacitor
A parallel plate capacitor of capacitance 600(\mu F) has a potential difference of 200V between its plates. Calculate the charge on either plate of the capacitor
a chemical cell of internal resistance 1(\Omega) supplies electric current to an external resistor of resistance 3(\Omega). Calculate the efficiency of the cell
An electric lamp is rated 240V, 40W. What is the cost of running the lamp for 72 hours if the electricity authority charges N2.50 per kWh?
Which of the following statements explains lost volt in an electric circuit? The
A constantan wire has a cross sectional area of 4 x 10-8m2 and a resistivity of 1.1 x 10-6(\Omega)m. If a resistor of resistance 11(\Omega) is to be made from this wire, calculate the length of the wire required
The mass and weight of a body on earth are 8kg and 80N respectively. Determine the mass and weight of the body respectively on a planet where the pull of gravity is (\frac{1}{8}) that on earth