Final answer:
The electron gun in a television tube uses a uniform electric field to accelerate electrons from rest to 4.4×10^7 m/s over a distance of 1.3 cm. The strength of the electric field is approximately 7.8923 x 10^11 N/C.
Step-by-step explanation:
The electron gun in a television tube uses a uniform electric field to accelerate electrons to a speed of 4.4×107 m/s. The distance over which this acceleration occurs is 1.3 cm. To find the strength of the electric field, we can use the equation:
E = (v^2 - u^2) / (2d)
Where E is the electric field strength, v is the final velocity of the electron, u is the initial velocity (which is 0 in this case as the electron starts from rest), and d is the distance over which the acceleration occurs.
Substituting the given values, we get:
E = (4.4×107)2 / (2 x 1.3 x 10-2) = 7.8923 x 1011 N/C
Therefore, the strength of the electric field is approximately 7.8923 x 1011 N/C.
The Question is incomplete. The complete question is
The electron gun in a television tube uses a uniform electric field to accelerate electrons from rest to 4.4×107m/s in a distance of 1.2 cm. What is the electric field strength?