Physics WJEC

Question 1

What particle is responsible for electricity?

Answer 1

Electrons

Question 2

What does a transformer do?

Answer 2

Changes the voltage of electricity using coils

Question 3

Which type of radiation is the most penetrating?

Answer 3

Gamma (γ) radiation

Question 4

If a 2kg object accelerates at 3 m/s², what is the force?

Answer 4

6 N (F = m × a)

Question 5

What is the equation for Ohm’s Law?

Answer 5

V = I × R

Question 6

What is the unit of power?

Answer 6

Watt (W)

Question 7

What is the equation for gravitational potential energy?

Answer 7

GPE = m × g × h

Question 8

State one use of an electromagnet.

Answer 8

Electric motors or loudspeakers

Question 9

What is the equation for kinetic energy?

Answer 9

KE = 0.5 × m × v²

Question 10

What is the transformer equation?

Answer 10

Vₚ / Vₛ = Nₚ / Nₛ

Question 11

What does the motor effect describe?

Answer 11

A wire with current in a magnetic field experiences a force

Question 12

What is the equation for acceleration?

Answer 12

a = (v - u) / t

Question 13

What is the equation for momentum?

Answer 13

p = m × v

Question 14

What is the equation for work done?

Answer 14

W = F × d

Question 15

How do airbags help in a crash?

Answer 15

Increase the time of impact, reducing the force

Question 16

What is the formula for calculating speed?

Answer 16

Speed = Distance / Time

Question 17

True or False: Acceleration is the rate of change of velocity.

Answer 17

True

Question 18

Fill in the blank: The unit of force in the SI system is the __________.

Answer 18

Newton

Question 19

What is the law that states that an object in motion stays in motion unless acted upon by an external force?

Answer 19

Newton’s First Law of Motion

Question 20

Multiple Choice: Which of the following is a vector quantity? A) Mass B) Speed C) Velocity D) Temperature

Answer 20

C) Velocity

Question 21

What is the gravitational field strength on Earth?

Answer 21

9.81 N/kg

Question 22

True or False: Energy cannot be created or destroyed.

Answer 22

True

Question 23

Fill in the blank: The energy stored in an object due to its position is called __________ energy.

Answer 23

potential

Question 24

What is the principle of conservation of energy?

Answer 24

Energy cannot be created or destroyed, only transformed.

Question 25

Multiple Choice: Which type of energy is associated with motion? A) Kinetic B) Thermal C) Chemical D) Nuclear

Answer 25

A) Kinetic

Question 26

What is the formula for gravitational potential energy?

Answer 26

Gravitational Potential Energy = mass × gravitational field strength × height

Question 27

True or False: Work is done when a force causes an object to move.

Answer 27

True

Question 28

Fill in the blank: The unit of energy is the __________.

Answer 28

Joule

Question 29

What is the relationship between work done and energy transferred?

Answer 29

Work done is equal to energy transferred.

Question 30

Multiple Choice: Which of the following is NOT a form of energy? A) Kinetic B) Potential C) Time D) Thermal

Answer 30

C) Time

Question 31

What does the term 'efficiency' refer to in physics?

Answer 31

The ratio of useful energy output to total energy input.

Question 32

True or False: A machine can create energy.

Answer 32

False

Question 33

Fill in the blank: The __________ of a wave is the distance between two consecutive crests.

Answer 33

wavelength

Question 34

What is the speed of light in a vacuum?

Answer 34

Approximately 3.00 × 10^8 m/s

Question 35

Multiple Choice: Which type of wave requires a medium to travel? A) Electromagnetic B) Sound C) Light D) Radio

Answer 35

B) Sound

Question 36

What is the formula for calculating the frequency of a wave?

Answer 36

Frequency = Speed / Wavelength

Question 37

True or False: Waves can interfere with each other.

Answer 37

True

Question 38

Fill in the blank: The __________ effect is the change in frequency due to the motion of the source or observer.

Answer 38

Doppler

Question 39

What is the definition of pressure?

Answer 39

Pressure is the force applied per unit area.

Question 40

Multiple Choice: Which of the following factors does NOT affect pressure? A) Area B) Force C) Height D) Temperature

Answer 40

C) Height

Question 41

What is the formula for calculating pressure?

Answer 41

Pressure = Force / Area