Asked in MDCAT Test Series 38 — Electrostatics

Directions: In the following question, a number sequence is given with one term missing. Choose the correct term that will continue the same pattern and replace the question mark in the given sequence.Q.5 2,20,42,68,98,?

Correct answer: A. 132

  • A. 132
  • B. 130
  • C. 134
  • D. 136

Explanation

The sequence is 2, 20, 42, 68, 98, ?. Calculate the differences: 20 - 2 = 18, 42 - 20 = 22, 68 - 42 = 26, and 98 - 68 = 30. The pattern in the differences is 18, 22, 26, 30, each increasing by 4. Therefore, the next difference should be 34. Adding 34 to 98 gives 132. Options 130, 134, and 136 do not adhere to this consistent pattern of increasing differences and are thus incorrect.

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About Electrostatics

Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.

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