A: If vacuum is not created inside an X -ray tube, X-rays will not be produced.
R: Without vacuum inside the X-ray tube the electrons are not emitted by the filament.

Options

A. If both Assertion & Reason are true and the reason is the correct explantion of the assertion , then mark (1)
B. if both Assertion & Reason are true but the reason is not the correct explantion of the assertion , then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step 1: Understanding the Assertion (A)
The assertion states that "If vacuum is not created inside an X-ray tube, X-rays will not be produced."

- In an X-ray tube, a vacuum is essential because it allows electrons to travel freely from the cathode to the anode without colliding with air or gas molecules.
- If there is no vacuum, the presence of air or gas molecules will impede the movement of electrons, reducing their energy and preventing effective collisions with the anode, which are necessary for X-ray production.

### Conclusion for Step 1:
Thus, the assertion is **true** because without a vacuum, the conditions necessary for X-ray production are not met.

### Step 2: Understanding the Reason (R)
The reason states that "Without vacuum inside the X-ray tube, the electrons are not emitted by the filament."

- The filament in the X-ray tube is heated to emit electrons through a process called thermionic emission. This process does not require a vacuum; electrons can be emitted in the presence of air.
- However, while electrons can be emitted, their travel towards the anode will be hindered by the air molecules, leading to a loss of energy and efficiency.

### Conclusion for Step 2:
Therefore, the reason is **false** because electrons can still be emitted from the filament even if there is no vacuum; they just won't be able to travel effectively to produce X-rays.

### Final Conclusion:
- Assertion (A) is **true**.
- Reason (R) is **false**.

### Answer:
The correct option is that Assertion is true and Reason is false.

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