Edtech startup PhysicsWallah is in initial talks to raise $250 million for raising its valuation and for potential mergers and acquisitions, Moneycontrol reported. The unicorn reportedly plans to value its company at $3.3 billion, three times its existing valuation of $1.1 billion. GSV Ventures and WestBridge, existing investors of the company, plan to add to their investments, the report added.