Braking Radiation

Q.

When a fast electron passes near a highly positively charged nucleus, x-rays are seen to get radiated. What could be the cause for this radiation?

1. All interactions between two charged particles result in radiation of energy
2. The nucleus deflects the electron inwards, giving it a centripetal acceleration, which causes the radiation from the charged electron
3. The nucleus speeds the electron up, giving rise to radiation from an accelerated charge
4. The radiation comes from the nucleus because of the change in its energy due to the electron.

Q. This one will need you to work the calculator a little bit. Given that an x-ray tube operates at 20Kv, what is the maximum speed of the electrons striking the anode? Take $1eV=1.6\times {10}^{19}$ J and $m_e=9\times {10}^{-31}$kg

1. $4.2\times {10}^{8}m/s$
2. $9.4\times {10}^{8}m/s$
3. $8.4\times {10}^{7}m/s$
4. $5.1\times {10}^{7}m/s$

Q.

Out of $\alpha ,\beta$ and $\gamma$ radiation,

Which radiation is most penetrating and which radiation are negatively charged?

Q. If a Coolidge tube operators at 20kV, what is the maximum kinetic energy you'll find among the electrons near the target?

1. 20eV
2. 200eV
3. 2, 000 eV
4. 20, 000eV

Q. This one will need you to work the calculator a little bit. Given that an x-ray tube operates at 20Kv, what is the maximum speed of the electrons striking the anode? Take $1eV=1.6\times {10}^{19}$ J and $m_e=9\times {10}^{-31}$kg

1. $4.2\times {10}^{8}m/s$
2. $9.4\times {10}^{8}m/s$
3. $8.4\times {10}^{7}m/s$
4. $5.1\times {10}^{7}m/s$

Q. An electron passing near a positively charged nucleus should get accelerated due to the attractive force, and it's speed should increase. But the opposite is observed! It's found to get slowed down. Why do you think?

1. The electron's kinetic energy is converted into electrostatic potential energy
2. The electron loses a lot of energy in radiation when its accelerated by the nucleus, resulting in a decrease in kinetic energy
3. Law of conservation of energy doesn't apply to sub-atomic particles.

Q.

Statement I : On increasing the current in the circuit, the maximum speed with which electrons reach the anode does not change.

Statement II : The accelerating potential between the anode and the cathode is independent of the filament circuit.

1. Both the statements are correct and statement II infers to Statement I

2. Both the statements are correct but statement II does not infer to statement I

3. Both the statements are incorrect

4. Statement I is correct but Statement II is incorrect