1999 JAMB UTME Physics Past Questions

1999

The equation of a wave travelling along the positive x-direction is given by;Y = 0.25 x 10-3 sin (500t - 0.025x).Determine the angular frequency of the wave motion.

1999

Four cells each of e.m.f 1.5V and internal resistance of 4Ω are connected in parallel. What is the effective e.m.f. and internal resistance of the combination?

1999

Steel is more suitable for permanent magnet than iron because the former

1999

Which of the following electromagnetic waves is least energetic?

1999

An astronomical telescope is said to be in normal adjustment when the

1999

The velocities of light in air and glass are 3.0 x 108ms-1 and 2.0 x 108ms-1 respectively. If the angle of refraction is 30°, the sine of the angle of incidence is

1999

The core of an efficient transformer should consist of laminated pieces of metal in order to

1999

At what frequency would a 10H inductor have a reactance of 2000Ω?

1999

In fleming's right-hand rule, the thumb, the forefinger and the middle finger if held mutually at right angles represent respectively, the

1999

A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the galvanometer could be converted to an ammeter capable of reading 2Amp. What is the current through the galvanometer?

1999

A 3000W electric cooker is to be used on a 200V mains circuit. Which of the fuses below can be used safely with the cooker?

1999

2311Na + Proton → pqX + alpha particleWhat are the values of p and q respectively in the equation above?

1999

In the Rutherford scattering experiment, a beam of alpha particles was fired at a thin gold film with some of the particles being considerably deflected. This shows that

1999

in a series R-L-C circuit at resonance, the voltages across the resistor and the inductor are 30V and 40V respectively, what is the voltage across the capacitor?

1999

What is the speed of a particle of mass 10-27kg whose wavelength is 10-8m.[h = 6.63 x 10-34Js]

1999

Gamma rays are produced when

1999

if ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆Px is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is…

1999

A semiconductor diode is used in rectifying alternating current into direct current mainly because it

1999

If ∆x is the uncertainty in the measurement of the position of a particle along the x-axis and ∆Pa is the uncertainty in the measurement of the linear momentum along the x-axis, then the uncertainty principle relation is…

1999

The diagram above shows the velocity-time graph of a vehicle. Its acceleration and retardation respectively are

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