Which of the following is a complex number?

4+9i

Step-by-step explanation:

A complex number has a real and imaginary component to it

It is in the form a+bi

4+9i

Step-by-step explanation:

A number which can be represented or expressed in the form a + bi is said to be a complex number. Here, a and b are the real numbers and i is the solution of an equation ().

Moreover, i used in the complex number is called an imaginary number as real number can satisfy the above mentioned equation.

Therefore, the correct answer option is 4+9i.

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v

explanation:

step-by-step explanation: