It seems to be "Answer", by Fredric Brown (scroll down a bit).

Here's some of the text:

Dwar Ev stepped back and drew a deep breath. “The honor of asking the first question is yours, Dwar Reyn.”

 

“Thank you,” said Dwar Reyn. “It shall be a question which no single cybernetics machine has been able to answer.”

 

He turned to face the machine. “Is there a God?”

 

The mighty voice answered without hesitation, without the clicking of a single relay.

 

“Yes, now there is a God.”

 

Sudden fear flashed on the face of Dwar Ev. He leaped to grab the switch.

 

A bolt of lightning from the cloudless sky struck him down and fused the switch shut.

In the story, a computer has not been built, but every single computer on every single planet in the entire universe has been connected.

It seems to be "Answer", by Fredric Brown (scroll down a bit).

Here's some of the text:

Dwar Ev stepped back and drew a deep breath. “The honor of asking the first question is yours, Dwar Reyn.”

“Thank you,” said Dwar Reyn. “It shall be a question which no single cybernetics machine has been able to answer.”

He turned to face the machine. “Is there a God?”

The mighty voice answered without hesitation, without the clicking of a single relay.

“Yes, now there is a God.”

Sudden fear flashed on the face of Dwar Ev. He leaped to grab the switch.

A bolt of lightning from the cloudless sky struck him down and fused the switch shut.

In the story, a computer has not been built, but every single computer on every single planet in the entire universe has been connected.

It seems to be "Answer", by Frederic Brown (scroll down a bit).

Here's some of the text:

Dwar Ev stepped back and drew a deep breath. “The honor of asking the first question is yours, Dwar Reyn.”

“Thank you,” said Dwar Reyn. “It shall be a question which no single cybernetics machine has been able to answer.”

He turned to face the machine. “Is there a God?”

The mighty voice answered without hesitation, without the clicking of a single relay.

“Yes, now there is a God.”

Sudden fear flashed on the face of Dwar Ev. He leaped to grab the switch.

A bolt of lightning from the cloudless sky struck him down and fused the switch shut.

In the story, a computer has not been built, but every single computer on every single planet in the entire universe has been connected.

It seems to be "Answer", by Fredric Brown (scroll down a bit).

Here's some of the text:

Dwar Ev stepped back and drew a deep breath. “The honor of asking the first question is yours, Dwar Reyn.”

“Thank you,” said Dwar Reyn. “It shall be a question which no single cybernetics machine has been able to answer.”

He turned to face the machine. “Is there a God?”

The mighty voice answered without hesitation, without the clicking of a single relay.

“Yes, now there is a God.”

Sudden fear flashed on the face of Dwar Ev. He leaped to grab the switch.

A bolt of lightning from the cloudless sky struck him down and fused the switch shut.

In the story, a computer has not been built, but every single computer on every single planet in the entire universe has been connected.