JAMB 2024 A voltmeter is connected in parallel with a variable resistance, R, which is in series with an ammeter and a cell. For one value of R the meters read…
JAMB 2024 An ideal transformer has 550 turns on the primary and 30 turns on the secondary. What is the maximum output p.d if the maximum input voltage is 3,300…
JAMB 2024 A 0.02 kg ice cube was melted at 0°C by an application of heat which further increased the temperature of the resulted water to 40°C. Calculate the…
JAMB 2024 Calculate the value of two equal charges if they repel one another with a force of 0.1 N when situated 50 cm apart in a vacuum. (Take 1/(4πε₀) = 9 ×…
JAMB 2024 An metal rod heated from 30°C to 80°C. The final length of the metal is 115 cm and the coefficient of linear expansion is 3 × 10⁻³ K⁻¹. What is the…
JAMB 2024 Ultraviolet light with a wavelength of 280 nm is used in an experiment on the photoelectric effect with a lithium cathode (work function, W_o = 2.5…
JAMB 2024 The displacement of a particle of a string carrying a travelling wave is given by y = (3.0 cm) sin 6.28(0.50x − 50 t), where x is in centimetre and t…
JAMB 2024 A proton moves at 8.00 × 10⁶ m/s along the x-axis. It enters a region in which there is a magnetic field of magnitude 2.50 T, directed at an angle of…
JAMB 2024 Which type of radiation is most likely to be emitted by an unstable nucleus with excess energy, and why? Verified
JAMB 2024 The instantaneous current in a circuit is given by i = 4sin(ωt + π/4). The RMS value of the current is