Phy 2

Question 1

What is nuclear radiation?

Answer 1

Nuclear radiation refers to the particles and energy emitted from the nucleus of an unstable atom.

Question 2

Name the three main types of nuclear radiation.

Answer 2

Alpha particles, beta particles, and gamma rays.

Question 3

True or False: Alpha particles can penetrate skin.

Answer 3

False.

Question 4

Fill in the blank: The unit of measurement for radiation dose is _____.

Answer 4

Sievert (Sv).

Question 5

What is the primary force that holds the nucleus of an atom together?

Answer 5

The strong nuclear force.

Question 6

Which type of force is gravity?

Answer 6

A fundamental force that attracts two bodies with mass.

Question 7

What is the formula for calculating speed?

Answer 7

Speed = Distance / Time.

Question 8

True or False: Speed is a vector quantity.

Answer 8

False.

Question 9

What are electromagnetic waves?

Answer 9

Waves of electric and magnetic fields that propagate through space.

Question 10

What is the speed of light in a vacuum?

Answer 10

Approximately 299,792 kilometers per second (km/s).

Question 11

Which electromagnetic wave has the longest wavelength?

Answer 11

Radio waves.

Question 12

What is a magnet?

Answer 12

An object that produces a magnetic field.

Question 13

True or False: All metals are magnetic.

Answer 13

False.

Question 14

What is an electromagnet?

Answer 14

A type of magnet in which the magnetic field is produced by an electric current.

Question 15

Fill in the blank: The strength of an electromagnet can be increased by increasing the _____ of the current.

Answer 15

Strength.

Question 16

What is the relationship between electricity and magnetism known as?

Answer 16

Electromagnetism.

Question 17

What is the primary use of nuclear radiation in medicine?

Answer 17

Diagnostic imaging and cancer treatment.

Question 18

Name a common application of electromagnetic waves.

Answer 18

Telecommunications, such as radio and television broadcasting.

Question 19

True or False: Electromagnetic waves require a medium to travel.

Answer 19

False.

Question 20

What is the principle behind MRI technology?

Answer 20

It uses strong magnetic fields and radio waves to create images of the body.

Question 21

What does the term ‘half-life’ refer to in nuclear physics?

Answer 21

The time required for half of the radioactive atoms in a sample to decay.

Question 22

What is the formula for gravitational force between two masses?

Answer 22

F = G * (m1 * m2) / r^2.

Question 23

Fill in the blank: The _____ is the force that opposes the motion of an object.

Answer 23

Friction.

Question 24

What is the difference between speed and velocity?

Answer 24

Speed is scalar; velocity is a vector that includes direction.

Question 25

What type of radiation is the most penetrating?

Answer 25

Gamma rays.

Question 26

True or False: Electromagnetic waves can travel through a vacuum.

Answer 26

True.

Question 27

What is a ferromagnetic material?

Answer 27

A material that can be magnetized and has a high magnetic permeability.

Question 28

What is the role of a magnetic field in an electric motor?

Answer 28

It interacts with electric current to produce motion.

Question 29

Fill in the blank: The _____ force is responsible for the attraction between charged particles.

Answer 29

Electromagnetic.

Question 30

What is the primary source of natural background radiation?

Answer 30

Cosmic rays and radon gas.

Question 31

What is the purpose of shielding in radiation protection?

Answer 31

To reduce exposure to harmful radiation.

Question 32

True or False: The Earth’s magnetic field protects us from solar radiation.

Answer 32

True.

Question 33

What phenomenon occurs when light passes through a prism?

Answer 33

Dispersion.

Question 34

What is the speed of electromagnetic waves in a vacuum?

Answer 34

The speed of light, approximately 299,792 km/s.

Question 35

Fill in the blank: The force of gravity is _____ proportional to the distance between two masses.

Answer 35

Inversely.

Question 36

What is the effect of increasing the number of coils in an electromagnet?

Answer 36

It increases the strength of the magnetic field.

Question 37

What is a common use of alpha radiation?

Answer 37

Smoke detectors.

Question 38

What is the primary cause of electromagnetic interference (EMI)?

Answer 38

Electrical devices emitting electromagnetic radiation.

Question 39

True or False: The frequency of an electromagnetic wave is inversely related to its wavelength.

Answer 39

True.