The figure shows how to implement an OR function with two inputs, using a relay. The relay contacts are NO and C. The truth table for this function will be:
A B O
0 0 0
0 1 1
1 0 1
1 1 1

The figure shows how to implement an OR function with two inputs, using a relay. The relay contacts are NO and C. The truth table for this function will be:
A B O
0 0 0
0 1 1
1 0 1
1 1 1