Physics JAMB Past Questions

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1971

In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6\(\Omega\) is connected to the other end of the wire. Determine the value of the unknown resistance

A. 3.2\(\Omega\)
B. 1.4\(\Omega\)
C. 3.21\(\Omega\)
D. 1.2\(\Omega\)

View Answer & Discuss (15) JAMB 2019

1972

Electrons were discovered by

A. Dalton
B. James Charwick
C. J.J. Thompson
D. Niels Bohr

View Answer & Discuss (1) JAMB 2019

1973

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

A. I only
B. II only
C. I & II only
D. I, II & III only

View Answer & Discuss (1) JAMB 2019

1974

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)\(\frac{1}{2}\)

View Answer & Discuss (1) JAMB 2019

1975

Ripple in a power supply unit is caused by