JAMB UTME 2022
JAMB Physics 2022 past questions
5 objective questions from the 2022 JAMB Physics paper. Answer each one, then reveal the answer and explanation.
Question 1
Work and energyCalculate the kinetic energy of a 8 kg body moving at 8 m/s.
- Option A: 512 J
- Option B: 32 J
- Option C: 64 J
- Option D: 256 J
Show the answerHide the answer to question 1
Answer: D, 256 J
KE = ½mv² = ½ × 8 × 8² = 256 J.
Question 2
WavesA wave of frequency 150 Hz has a wavelength of 1.5 m. Find its speed.
- Option A: 225 m/s
- Option B: 100 m/s
- Option C: 0.01 m/s
- Option D: 450 m/s
Show the answerHide the answer to question 2
Answer: A, 225 m/s
v = fλ = 150 × 1.5 = 225 m/s.
Question 3
HeatHow much heat is needed to raise the temperature of 3 kg of copper by 35 °C? (Specific heat capacity of copper = 400 J/kg K.)
- Option A: 21,000 J
- Option B: 1,200 J
- Option C: 14,000 J
- Option D: 42,000 J
Show the answerHide the answer to question 3
Answer: D, 42,000 J
Q = mcΔθ = 3 × 400 × 35 = 42,000 J.
Question 4
DensityA sample of mass 20 g occupies a volume of 25 cm³. Calculate its density.
- Option A: 1.25 g/cm³
- Option B: 0.8 g/cm³
- Option C: 8 g/cm³
- Option D: 0.4 g/cm³
Show the answerHide the answer to question 4
Answer: B, 0.8 g/cm³
Density = mass ÷ volume = 20 ÷ 25 = 0.8 g/cm³.
Question 5
Current electricityA potential difference of 3 V is applied across a 3 Ω resistor. Find the current that flows.
- Option A: 9 A
- Option B: 1 A
- Option C: 2 A
- Option D: 6 A
Show the answerHide the answer to question 5
Answer: B, 1 A
By Ohm's law, I = V ÷ R = 3 ÷ 3 = 1 A.
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