Physics 2019 JAMB Past Questions

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Electrons were discovered by

Which of the following is/are the limitations to the Rutherford's atomic models?

I. It is applicable when energy is radiated as electrons are revolving

II. It is applicable when energy is radiated in a continuous mode

III. It is applicable to an atom with only one electron in the other shell

Which of the following equations is the correct definition of the reactance of an indicator L?

A. Reactance = (Amplitude of voltage) \(\div\) (Amplitude of current)
B. Reactance = (Amplitude of voltage) x (Amplitude of current)
C. Reactance = (Amplitude of current)\(^2\) \(\div\) (Amplitude of voltage)
D. Reactance = (Amplitude of current)\(^2\) \(\div\) (Amplitude of voltage)\(\frac{1}{2}\)

Ripple in a power supply unit is caused by

When the temperature of a liquid is increased, its surface tension?