Answer:
F = +17.48 N
Step-by-step explanation:
We have,
Electric charge is +0.638 C and the electric field is 27.4 N/C to the right.
It is required to find the electric force felt by the electric charge.
When a charged particle is placed in electric field, it will posses electric force. The sign of force depends on the charged particle.
The electric force is given by :

So, the electric force is 17.48 N and the force is positive.