Paper 2

Question 1

What is the formula for power?

Answer 1

Power P = VI = I²R = V²/R

Question 2

What is the formula for EMF?

Answer 2

Emf ε = E/Q ε = I (R + r)

Question 3

How do you write a value with uncertainty?

Answer 3

Mean + ½ x range

Question 4

How do you handle uncertainty when adding and subtracting?

Answer 4

Add absolute uncertainty.

Question 5

How do you handle uncertainty when multiplying and dividing?

Answer 5

Add percentage uncertainty.

Question 6

What is the formula for % error?

Answer 6

(Difference between experimental value and true value)/(true value)

Question 7

What is the formula for linear speed?

Answer 7

v = 2πr/T = 2πrf = rw

Question 8

What is the formula for angular displacement?

Answer 8

θ = 2πt/T = 2πtf

Question 9

What is the formula for angular speed?

Answer 9

ω = θ/t = 2π/t = 2πf

Question 10

What is the formula for centripetal acceleration?

Answer 10

a = v²/r = ω²r = vw

Question 11

What is the formula for centripetal force?

Answer 11

F = (mv²)/r = mw²r = mvω

Question 12

What is the formula for force at the top of a hill?

Answer 12

F = (mv²)/r = mg - s

Question 13

What is the formula for force in a big dipper?

Answer 13

F = s - mg= (mv²)/r

Question 14

What is the formula for force in a very long swing?

Answer 14

s - mg = (mv²)/L

Question 15

What is the formula relating speed and height?

Answer 15

v² = 2gh

Question 16

What is the formula for acceleration in simple harmonic motion?

Answer 16

a = -ω²x

Question 17

What is the formula for velocity in simple harmonic motion?

Answer 17

v = + ω√(A² - x²)

Question 18

What is the formula for maximum velocity in simple harmonic motion?

Answer 18

vmax = ωA

Question 19

What is the formula for maximum acceleration in simple harmonic motion?

Answer 19

amax = ω²A

Question 20

What is the formula for the period of a mass-spring system?

Answer 20

T = 2π√(m/k)

Question 21

What is the formula for the period of a simple pendulum?

Answer 21

T = 2π√(l/g)

Question 22

What is the formula for energy in temperature change?

Answer 22

Q = mc∆θ

Question 23

What is the formula for energy in state change?

Answer 23

Q = ml

Question 24

What is the ideal gas law?

Answer 24

pV = nRT, pV = NkT

Question 25

What is Boyle's Law?

Answer 25

PV = constant

Question 26

What is Charles’ Law?

Answer 26

V/T = constant

Question 27

What is the Pressure Law?

Answer 27

p/T = constant

Question 28

What is the kinetic theory model?

Answer 28

pV = 1/3Nm(crms)²

Question 29

What is the formula for kinetic energy of a gas molecule?

Answer 29

1/2m (crms)² = 3/2kT = 3RT/2Nₐ

Question 30

What is the combination of the pressure laws?

Answer 30

pV/T = constant

Question 31

What is the formula for Force between two masses?

Answer 31

F = GMm/r^2

Question 32

How is gravitational field strength (g) calculated?

Answer 32

g = F/m

Question 33

What is the magnitude of gravitational field strength in a radial field (g)?

Answer 33

g = GM/r^2

Question 34

What is the formula for work done (w) in gravitational field?

Answer 34

w = mΔV

Question 35

What is the gravitational potential (V)?

Answer 35

V = -GM/r

Question 36

How is gravitational field strength (g) related to potential difference?

Answer 36

g = -ΔV/Δr

Question 37

What is the formula for Force between two point charges?

Answer 37

F = kQq/r^2

Question 38

How is the force on a charge calculated?

Answer 38

f = EQ

Question 39

What is the field strength for a uniform field (E)?

Answer 39

E = V/d

Question 40

What is the formula for work done in an electric field?

Answer 40

w = QΔV

Question 41

What is the electric field strength for a radial field?

Answer 41

E = kQ/r^2

Question 42

What is the electric potential (V)?

Answer 42

V = kQ/r

Question 43

How is electric field strength (E) related to potential difference?

Answer 43

E = ΔV/Δr

Question 44

What is the formula for capacitance (C)?

Answer 44

C = Q/V C = Aε0εr/d

Question 45

What is the energy stored in a capacitor (E)?

Answer 45

E = 1/2 QV E = 1/2 C V^2 E = Q^2/(2C)

Question 46

What is the charging formula for a capacitor?

Answer 46

Q = Q0(1 - e^(-t/RC)) V = V0(1 - e^(-t/RC)) I = I0 e^(-t/RC)

Question 47

What is the discharging formula for a capacitor?

Answer 47

Q = Q0 e^(-t/RC) V = V0 e^(-t/RC) I = I0 e^(-t/RC)

Question 48

What is the time constant (τ) for a capacitor?

Answer 48

τ = RC

Question 49

What is the formula for force in a magnetic field?

Answer 49

F = BIl

Question 50

What is the formula for force on a charge in a magnetic field?

Answer 50

F = BQv F = Bev

Question 51

What is the formula for magnetic flux (φ)?

Answer 51

φ = BA

Question 52

What is the formula for magnetic flux linkage?

Answer 52

Nφ = BANcosθ

Question 53

How is induced emf (ε) calculated?

Answer 53

ε = -N(Δφ/Δt)

Question 54

What is the induced emf in a rotating coil?

Answer 54

ε = BANω sin(ωt)

Question 55

How is the root mean square current (Irms) calculated?

Answer 55

Irms = I0/√2

Question 56

How is the root mean square voltage (Vrms) calculated?

Answer 56

Vrms = V0/√2

Question 57

What are the transformer equations?

Answer 57

Ns/Np = Vs/Vp = Ip/Is

Question 58

How is efficiency (%) calculated for a transformer?

Answer 58

Efficiency (%) = IsVs/IpVp

Question 59

What is the inverse square law for γ radiation?

Answer 59

I = k / x^2

Question 60

What are the formulas for radioactive decay?

Answer 60

(ΔN) / (Δt) = -λN

Question 61

What is the formula for activity (A)?

Answer 61

A = λN

Question 62

How is half-life (t½) calculated?

Answer 62

t½ = (ln(2)) / λ

Question 63

What is the formula for nuclear radius (R)?

Answer 63

R = R0 A^(1/3)

Question 64

What is the energy mass equation (binding energy)?

Answer 64

E = mc^2