JAMB and WAEC Physics questions: Elasticity

25 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Elasticity· WAEC

   Beyond the yield point, a stretched wire

   • Areturns to its original length
   • Bobeys Hooke's law
   • Cundergoes plastic deformation
   • Dhas no extension

   Show answer

   Explanation and discussion

2. Question 22· Elasticity· WAEC

   A spring stretches by 2 cm under a load of 4 N. Find its extension under a load of 10 N, within the elastic limit.

   • A8 cm
   • B20 cm
   • C5 cm
   • D2.5 cm

   Show answer

   Explanation and discussion

3. Question 23· Elasticity· WAEC

   Strain is defined as

   • Aoriginal length divided by extension
   • Bforce divided by area
   • Cforce divided by extension
   • Dextension divided by original length

   Show answer

   Explanation and discussion

4. Question 24· Elasticity· WAEC

   A spring of force constant 200 N/m is stretched by 5 cm. What force is applied?

   • A40 N
   • B1000 N
   • C10 N
   • D4 N

   Show answer

   Explanation and discussion

5. Question 25· Elasticity· JAMB

   A wire 2 m long with a cross-section of 1 × 10⁻⁶ m² stretches 1 mm under a load of 100 N. Find its Young's modulus.

   • A5 × 10¹⁰ Pa
   • B2 × 10⁸ Pa
   • C2 × 10¹¹ Pa
   • D1 × 10¹¹ Pa

   Show answer

   Explanation and discussion