How did Voldemort lose his wand?

Answer 1

Hermione accidentally broke it when they were in Bathilda Bagshot's home, and Nagini attacked them. While she was apparating them, the wand snapped.

Actually it got hit by one of Hermione's rebounding spells!

Answer 2

He disposed of the phoenix feather one when he discovered the connection between his and Harry's phoenix one. The elder wand was won from him by Harry Potter, even though it was never truly his (or Draco's), it lay in Dumbledore's tomb until Voldemort stole it.

Answer 3

He broke it because it only brought trouble. He didnt need the wand and didnt want it to be in possession of any other wizard or witch because he had seen the harm the wand brought its owners.

It didn't happen in the book, mind you.

Answer 4

He sat on it. I think it was when they were in the car on their way to Hogwarts. (The flying Car)

Answer 5

Because Harry's wand recognized Voldemort holding so, with the power and enmity of the twin cores, overpowered Lucius's pathetic little stick.

Answer 6

While flying his dad's car to Hogwarts, the car got tired and lost control, sending them crashing into the Whomping Willow. Ron's wand was broken during the crash.

Answer 7

Harry repaired his wand with the elder wand - which Harry was the master of. This is the only wand powerful enough to repair another, even Ollivander could not fix Harry's.

Answer 8

Harry used the elder wand to repair his holly and phoenix feather wand.