Jamb Physics Past Questions and Answers

Question 2361:

• JAMB 2023

A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

[Take g = 10 ms${}^{-2}$]

A. $2.4\times {10}^{10}(N{m}^{-2})$
B. $1.5\times {10}^{10}(N{m}^{-2})$
C. $2.4\times {10}^9(N{m}^{-2})$
D. $1.3\times {10}^{10}(N{m}^{-2})$

Question 2362:

• JAMB 2023

A man swung an object of mass 2 kg in a circular path with a rope 1.2 m long. If the object was swung at 120 rev/min, find the tension in the rope.

A. 400
B. 288
C. 240
D. 379

Question 2363:

• JAMB 2023

A 200 kg load is raised using a 110 m long lever as shown in the diagram above. The load is 10m from the pivot P. If the efficiency of the the lever is 80%, find the effort E required to lift the load.

[Take g = 10ms-2]

A. 250
B. 300
C. 450
D. 200

Question 2364:

• JAMB 2023

An air bubble of radius 4.5 cm initially at a depth of 12 m below the water surface rises to the surface. If the atmospheric pressure is equal to 10.34 m of water, the radius of the bubble just before it reaches the water surface is

A. 6.43 cm
B. 8.24 cm
C. 4.26 cm
D. 5.82 cm

Question 2365:

• JAMB 2023

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 ${\epsilon }_o$ = $8.85\times {10}^{-}12F{m}^{-}1$

A. 3.54nC
B. 42.5nC
C. 35.4nC
D. 4.25nC