Two parallel plates carry opposites charges such that the electric field in the space between them is in upward direction. An electron is shot in the space and parallel to the plates . Its deflection from the original direction will be

Options

A. Upwards
B. Downwards
C. Circular
D. Elliptical

Answer

To solve the problem, we need to analyze the situation of an electron moving between two parallel plates with an electric field directed upwards. Here's a step-by-step breakdown of the solution:

### Step 1: Understand the Setup
We have two parallel plates:
- The upper plate is positively charged.
- The lower plate is negatively charged.
- The electric field (E) between the plates is directed upwards (from the positive plate to the negative plate).

**Hint:** Remember that electric field lines point from positive to negative charges.

### Step 2: Identify the Charge of the Electron
An electron carries a negative charge. When it enters the region between the plates, it will experience forces due to the electric field.

**Hint:** Recall that opposite charges attract and like charges repel.

### Step 3: Determine the Force on the Electron
Since the electric field is directed upwards, the force (F) acting on the electron will be in the direction opposite to the electric field (downwards). This is because the force on a charge in an electric field is given by:
\[ F = qE \]
where \( q \) is the charge of the electron (negative) and \( E \) is the electric field (upward).

**Hint:** Consider the direction of the force acting on a negative charge in an electric field.

### Step 4: Analyze the Motion of the Electron
As the electron is shot parallel to the plates, it will initially move in a straight line. However, due to the downward force acting on it, its trajectory will start to curve downwards.

**Hint:** Think about how the motion of the electron changes due to the force acting on it.

### Step 5: Conclusion on Deflection
The electron will be deflected downwards from its original path due to the downward force exerted by the electric field. Therefore, the deflection from the original direction will be downward.

**Hint:** Visualize the path of the electron as it moves under the influence of the electric field.

### Final Answer
The deflection of the electron from its original direction will be **downward**.