With explanation please Lab Day/Ti Wednesday Homework 3 Electric Field Multiple-

Question

With explanation please Lab Day/Ti Wednesday Homework 3 Electric Field Multiple-Choice Problems Wednesday Homework Problem 3.1 Electric field is defined as Select One of the Following (a) something charge makes. (b) energy per unit charge. (c) force per unit charge. (d) energy per unit force. Wednesday Homework Problem 3.2 There is considerable excitement about the possibility of building a particle accelerator the size of a table top. These devices use the electric field in a plasma wave to accelerate the particles. They claim an electric field of 1.0 x 1011 How long would it take this field to accelerate an electron (massa 9.11 x 10-3 kg and charge 1.6 x 10-13C) to the speed of light (v 30 x 10 Assume constant acceleration and neglect relativity For those of you who have forgotten absolutely everything from PHYS 111. for constant accelerat ion at Select One of the Following (a) 1.3 x 10-2, (b) 32 x 10's (c) 6.5 x 10's (d) 1.7 x 10 (e) 9.1 x 10-7 Wednesday Homework Problem 3.3 The temperature of ocean water and the velocity of the water flow change with the position in the ocean. Which of the following quantities are a vector field? Select One of the Following (a) water temperature (b) water velocity (c) neither water velocity nor temperature (d) both water velocity and temperature

Explanation / Answer

3.1)(c) Force per unit charge.

Because, the defination of electric field is electric force per unit charge.

3.2)(d) 1.7 x 10^-14 s is correct.

explanation

We know that,

F = q E and also F = ma

q E = m a => a = q E / m

a = 1.6 x 10^-19 x 1 x 10^11 / 9.1 x 10^-31 = 1.76 x 10^22 m/s^2

we know from eqn of motion

v = u + at ; when u = 0

v = at =. t = v/a = 3 x 10^8/1.76 x 10^22 = 1.7 x 10^-14 s

Hence, (d) 1.7 x 10^-14 s is correct.

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