1990 - JAMB Physics Past Questions and Answers - page 4
Three cells each of e.m.f. 1.5v and an internal resistance of 1.0(\Omega) are connected in parallel across a load resistance of 2.67(\Omega). Calculate the current in the load?
When a known standard resistor of 2(\Omega) is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?
The total energy required to send a unit positive charge round a complete electrical circuit is the
Which of the following is an essential physical property of the wires used for making fuses?
Which of the following is most suitable for protecting the circuit of 2000W electric iron connected to a 250V mains?
Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is reduced due to
A lamp is rated 240V, 60W. The resistance of the filament is
A 0 - 10mA galvanometer with a coil resistance of 30(\Omega) can be converted to a 0 - 10A ammeter by using
The number of neutrons contained in the nucleus (^{238}_{92}U) is
What precaution should a manufacturer take to ensure that energy loss in a transformer is minimized?