A wire of resitance R is cut into n equal parts

Post 296

SSC CHSL Questions 2014

Question 159 A wire of resitance R is cut into n equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be

A) nR

B) R/n

C) n/R

D) R/n2

Answer : R/n2

Explanation:  because when a wire is cut in two equal parts then the resistance of the combination comes to be R/4.

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Question 160 A bullet hits and gets embedded in a solid block resting on a horizontal frictionless table. Which physical quantity is conserved in this process?

A) Momentum and kinetic energy

B) Momentum alone

C) Kinetic energy alone

D) Neither momentum nor kinetic energy

Answer: Momentum alone

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A moving neutron collides with a stationary alpha particle

Post 285

SSC CHSL Questions 2014

Question 194 A moving neutron collides with a stationary alpha particle. The fraction of the kinetic energy lost by the neutron is

A) 1/4

B) 1/16

C) 9/25

D) 16/25

Answer: Comment if you know the answer.

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