2023 - JAMB Physics Past Questions and Answers - page 2
An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 \(P_a\), what is the absolute pressure in \(P_a\) in the tank if the height of the mercury in the open tube is 25 cm higher
108,986 Pa
165,238 Pa
122,364 Pa
134,645 Pa
What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?
Bohr model
Dalton model
Rutherford model
Thomson model
A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.
[Take g = 10 ms-1]
195
271 m
391 m
136 m
Which of the following liquids has the highest surface tension?
Soapy water
Water
Mercury
Oil
A parallel plate capacitor separated by an air gap is made of \(0.8m^2\) tin plates and 20 mm apart. It is connected to 120 V battery. What is the charge on each plate?
Take \(ε_o\) = \(8.85×10^-12 Fm^-1\)
3.54nC
42.5nC
35.4nC
4.25nC
Rainbow formation is as a result of the combination of which of the following phenomena?
(i) Reflection
(ii) Dispersion
(iii) Total internal reflection
(iv) Refraction
(ii) and (iv) only
(i), (iii) and (iv) only
(i), (ii) and (iv) only
(ii), (iii) and (iv) only
The surface temperature of a swimming pool on a warm day is 25oC and the temperature at the bottom is 15oC. If the swimming pool has a surface area of 620 m2 and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.
[Thermal conductivity of water (k) = 0.6071 Wm-1K-1]
2.5kw
250kw
300kw
3.0kw
A step-down transformer is used on a 2.2 kV line to deliver 110 V. How many turns are on the primary windings if the secondary has 25 turns?
20
250
200
500
Which of the following materials is a good insulator?
Silver
Water
Rubber
Copper
The property of wave shown in the diagram above is?