2023 Neco Physics Answers 2023

NECO 2023 PHYSICS

PHYSICS OBJ*
01-10: DADEAEBEDC
11-20: ECDA#DBCCD
21-30: CBCBDACCBB
31-40: EADDCDCDAA
41-50: EDACDCACAA
51-60: AEBACCBCAC

NUMBER 11

(11a)
Pick any two(2)

1. Radiation Exposure: X-rays are a form of ionizing radiation, which can cause damage to living tissue, including skin and organs.
2. Cancer Risk: Long-term exposure to X-rays increases the risk of developing cancer.
3. Skin Burns: X-rays can cause skin burns if the patient is exposed to too much radiation.
4. Pregnancy Risk: Exposure to X-rays during pregnancy may cause birth defects or other health problems in the baby.
5. Eye Damage: X-rays can cause eye damage, including cataracts and other vision problems.

(11b)
Soft X-rays have a lower energy and shorter wavelength *than* hard X-rays. Soft X-rays are typically used in medical imaging, such as X-ray imaging of the chest and abdomen. Hard X-rays have a higher energy and longer wavelength than soft X-rays. Hard X-rays are typically used in industrial applications, such as inspecting welds and other materials.
NECO PHYSICS

NUMBER EIGHT

(8a)
PICK ANY TWO(2)

1. Communication: Radio waves, microwaves, and other forms of electromagnetic radiation are used to transmit information over long distances.

2. Electric Motors: Electromagnetic fields are used to generate torque in electric motors.

3. Magnetic Resonance Imaging (MRI): MRI uses strong magnetic fields to create detailed images of the inside of the body.

4. Electric Generators: Electromagnetic fields are used to generate electricity in electric generators.

5. Navigation: Electromagnetic fields are used to determine the position and orientation of objects.

(8b)
To convert a soft iron bar into a magnet, the bar must be placed in a strong magnetic field. This can be done by stroking the bar with a bar magnet. This process, known as magnetization, aligns the domains of the soft iron bar, making it a magnet.