Test your basic knowledge |

GRE Physics

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Thermo: Blackbody Radiation
L = T - V dL/dq = d/dt dL/dqdot
P² ~ R³
J/(ne) n: atom density
F = s * T4

2. Rayleigh criterion
? = 1.22? / d
L = mr²d?/dt
ih_barL_z
.5 LI²

3. Solid: Resistivity of Metal
?~T
E²-p²c²
F = -2*m(? x r)
Dp/dt = L / (t ?V)

4. Inductance of Solenoid
J/(ne) n: atom density
S = k ln[O] ; dS = dQ/T
L = µ N² A / l : N = number of turns - A = cross sectional area -l = length
Infinitely close to equilibrium at all times

5. Energy in Inductor
0
v(mean)
Q = U + W Q = heat in system - U = total energy in system - W = work done by gas
.5 LI²

6. Lensmaker Equation - Thin Lens
1/f = (n-1)(1/R1 - 1/R2) if both positive - they are convex - concave
?_max = b/T
I = I_cm + md²
Q = U + W Q = heat in system - U = total energy in system - W = work done by gas

7. 3 Laws of Thermo
F = s * T4
KE = 1/2 * µ (dr/dt)² L = µ r x v
1. Heat is energy 2. Entropy never decreases 3. Entropy approaches a constant value as t -> 0...
L = mr²d?/dt

8. Double Slit: Interference Minimum - Diffraction Minimum
Interference: (m+.5)? = d sin(?) Diffraction: m? = w sin(?)
W' = (w-v)/(1-w v/c^2) ; observer in S sees an object moving at velocity w; another frame S' moves at v wrt S.
qvb = mv²/R
I = -(c ?t)^2 + d^2

9. Solid: Resistivity of Semi-Conductor
?~1/T
.5 LI²
E = <?| H |?>
1/2 CV²

10. Weighted average (mean and unc. of mean)
Let w_i = 1/s_i^2;x_wav = S(w_i x_i) / Sw_i - s_xwav = 1/Sw_i
? = 1.22?/D
?? = h/mc * (1-cos(?))
u dm/dt

11. Rocket Equation
Sin(?) = ?/d
.5 LI²
Z²/n² (m_red/m_elec)
Dv = -udm/m - v = v0 + u ln(m0/m)

12. First law of thermodynamics (explain direction of energy for each term)
Q = U + W Q = heat in system - U = total energy in system - W = work done by gas
Let w_i = 1/s_i^2;x_wav = S(w_i x_i) / Sw_i - s_xwav = 1/Sw_i
?? = h/mc * (1-cos(?))
W' = (w-v)/(1-w v/c^2) ; observer in S sees an object moving at velocity w; another frame S' moves at v wrt S.

13. Energy levels from the Coulomb potential
S = k ln[O] ; dS = dQ/T
?~1/T
E_n = -µ c^2 Z a^2 / (2n^2) - with µ = m_1 m_2 / (m_1 + m_2)
?? = h/mc * (1-cos(?))

14. Astro: Aperture Formula (Rayleigh Criterion)
?= h/v(2mE)
? = 1.22?/D
DB = ( µ_0 I/(4Pi) ) dl(cross)rhat/r^2
? = ?_0 Sqrt[(1+v/c)/(1-v/c)]

15. Center of Mass: Kinetic Energy & Angular Momentum
µ0 I1I2 / (2pd)
Asin(?) = m?
KE = 1/2 * µ (dr/dt)² L = µ r x v
W' = (w-v)/(1-w v/c^2) ; observer in S sees an object moving at velocity w; another frame S' moves at v wrt S.

16. Dulong Petit Law
(° of Freedom)kT/2
H = H_0 + ?H
North to south; Earth has S magnetic pole at the N geographic pole and vice versa.
Cv = dE/dT = 3R

17. Volumetric Expansion
Exp(N(µ-e)/t)
S_mean = s/Sqrt[N]
North to south; Earth has S magnetic pole at the N geographic pole and vice versa.
V = V0 + V0 a ?T

18. Quant: Commutator Relation [AB -C]
Exponentially decreasing radial function
1/f = (n-1)(1/R1 - 1/R2) if both positive - they are convex - concave
1/ne - where n is charge carrier density
A[B -C] + [A -C]B

19. Selection rules for atomic transitions
?scl = +/-1;?m = 0 - +/-1;?S_tot = 0;(?j = ?scl + ?S_tot)
Infinitely close to equilibrium at all times
L^2 |E - scl - m> = hbar^2 scl(scl+1) |E -scl -m> L_z |E - scl - m> = hbar m |E - scl - m>
C_eq = (? 1/C_i)^-1

20. SR: Spacetime Interval
E = Vmin : circle - E = 0 : parabola - E<0 : el - E>0 : h
Z²/n² (m_red/m_elec)
ds² = (c*dt)² - ?(x_i)²
1. Heat is energy 2. Entropy never decreases 3. Entropy approaches a constant value as t -> 0...

21. Polarizers - intensity when crossed at ?
P/A = s T^4
µ = m_e/2
I = I_0 Cos[?]^2
H = T + V;qdot_i = dH/dp_i - pdot_i = dH/dq_i

22. Relativistic Energy
<?1|?2> = 0 ? Orthogonal
NC?T
Exponential - E = -ma²/2hbar² - a is strength of delta wellt
?mc²

23. E field of a capacitor (d->0)
E = s/e_0
Infinitely close to equilibrium at all times
X_L = X_C or X_total = 0
I = I_0 Cos[?]^2

24. Wein'S Displacement Law
L = L_0 Sqrt[1-v^2/c^2]
(3/2) n R ?t
C = 4pe0 ab/(a-b) = inner and outer radii
?max = 2.898 x 10 -³ / T

25. Perturbations
? (t-vx/c²)
?= h/v(2mE)
F = I L X B
H = H_0 + ?H

26. Work (P - V)
E = <?| H |?>
? exp(-e/t)
P1V1 - P2V2 / (? - 1)
dQ = dW +dU

27. Ohm'S Law w/ current density
<T> = -<V>/2
J = E s - s = Conductivity - E = Electric field
North to south; Earth has S magnetic pole at the N geographic pole and vice versa.
L = L_0 Sqrt[1-v^2/c^2]

28. Energy for orbits: Hyperbole - Ellipse - Parabola - Circle
F = µ0 q v I / 2pr
Exponentially decreasing radial function
E = Vmin : circle - E = 0 : parabola - E<0 : el - E>0 : h
Product ( nj ^ vj ) = Product(nqj ^ vj exp (-vj F(int)/Tau))

29. Law of Mass Action
Product ( nj ^ vj ) = Product(nqj ^ vj exp (-vj F(int)/Tau))
Isentropic
S = (hbar/2) s ;with S = S_x xhat + S_y yhat + S_z zhat -s = s_x xhat + s_y yhat + s_z zhat
Interference: (m+.5)? = d sin(?) Diffraction: m? = w sin(?)

30. Atom: Bohr Theory Ionization
?~T
E = Z²*E1
Dp/dt = L / (t ?V)
E_n = -µ c^2 Z a^2 / (2n^2) - with µ = m_1 m_2 / (m_1 + m_2)

31. Boltzmann / Canonical distribution
.5 CV²
Exp(N(µ-e)/t)
? = h/mv
P(s) = (1/Z) Exp[-E(s)/(k T)] Z = S_s(Exp[-E(s)/(k T)])

32. De Broigle Wavelength
F_f = µ*F_N
DW = P dV
? = h/mv
(3/2) n R ?t

33. EM: Lorentz Force
B = µ0 I (sin(?1)-sin(?2))/(4pr) r = distance from point
N d flux / dt
F = qv×B
.5 CV²

34. Quant: Expectation Value
<?|O|?>
ih_barL_z
E = <?| H |?>
H = H_0 + ?H

35. Mech: Rotational Energy
J = ? Fdt
Exponentially decreasing radial function
1/f = (n-1)(1/R1 - 1/R2) if both positive - they are convex - concave
T = I?²/2

36. Electromotive Force
I = Im (sinc²(a)) ; a = pai sin(?) / ?
DW/dq
NC?T
X_C = 1/(i?C)

37. Energy in a Capacitor
X_L = X_C or X_total = 0
Let w_i = 1/s_i^2;x_wav = S(w_i x_i) / Sw_i - s_xwav = 1/Sw_i
J/(ne) n: atom density
.5 CV²

38. Mech: Parallel Axis Theorem (Moment of Inertia)
I = I_cm + md²
F = mv²/r
Infinitely close to equilibrium at all times
F = qv×B

39. Perpendicular axis theorem
L = µ N² A / l : N = number of turns - A = cross sectional area -l = length
div(E) = ?/e_0 - curl(E) = der(B)/der(t) - div(B) = 0 - curl(B) = µ_0J + µ_0e_0*der(E)/der(t)
I_z = I_x + I_y (think hoop symmetry)
Dp/dt = L / (t ?V)

40. Internal Energy of an Ideal Gas
L^2 |E - scl - m> = hbar^2 scl(scl+1) |E -scl -m> L_z |E - scl - m> = hbar m |E - scl - m>
(3/2) n R ?t
C_eq = ?C_i
? = ?_0 Sqrt[(1+v/c)/(1-v/c)]

41. Spherical Capacitor Equation
Opposing charge induced upon conductor
µ = m_e/2
C = 4pe0 ab/(a-b) = inner and outer radii
T^2 = k R^3 - k=constant

42. Magnetic Field of a long solenoid
B = µ0 I n
<T> = -<V>/2
Let w_i = 1/s_i^2;x_wav = S(w_i x_i) / Sw_i - s_xwav = 1/Sw_i
1/f = (n-1)(1/R1 - 1/R2) if both positive - they are convex - concave

43. Poisson distribution (µ and s)
Exponential - E = -ma²/2hbar² - a is strength of delta wellt
Faraday/Lenz: current inducted opposes the changing field
?max = 2.898 x 10 -³ / T
µ=s^2

44. Quant: Orthogonality of States
W' = (w-v)/(1-w v/c^2) ; observer in S sees an object moving at velocity w; another frame S' moves at v wrt S.
F = s * T4
When you apply a uniform electric field - it induces a dipole moment and interacts with it - and that effect depends on |mj |. So if j is an integer - splits (asymmetrically) into j+1 levels - and if j is a half integer - splits (asymmetrically) into
<?1|?2> = 0 ? Orthogonal

45. Single Slit Diffraction Maximum
P +1/2 ? v² + ?gh = Constant
I_z = I_x + I_y (think hoop symmetry)
Asin(?) = m?
PdV +dU

46. Bohr Model: Radii
P(s) = (1/Z) Exp[-E(s)/(k T)] Z = S_s(Exp[-E(s)/(k T)])
North to south; Earth has S magnetic pole at the N geographic pole and vice versa.
N²/Z (m_elec/m_red)
I ' = I cos²(?)

47. Source-free RC Circuit
? = 5/3
ma + kx = 0
CdV/dt + V/R = 0 V(t) = V0 exp(-t/RC) I(t) = I(0) exp(-t/RC)
1/ne - where n is charge carrier density

48. Astro: p-p Chain
Q = CVexp(-t/RC)
I = Im (sinc²(a)) ; a = pai sin(?) / ?
X_L = X_C or X_total = 0
4H + 2e- ? He +2? + 6?

49. Atom: Positronium Reduced Mass
Ct²-x²-y²-z²
I_z = I_x + I_y (think hoop symmetry)
µ = m_e/2
U = t^2 d/dt (logZ)

50. Focal point of mirrror with curvature
IR + Ldi/dt = 0 - I = I0e(-tL/R) Work = 1/2 L I0^2
Cos[?] Sin[?] -Sin[?] Cos[?]
F = R/2
<?1|?2> = 0 ? Orthogonal

Can you answer 50 questions in 15 minutes?

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go to https://www.isc2.org/ PMP ITIL RHCE MCTS More...	IT Skills Android Programming Data Modeling Objective C Programming Basic Python Programming Adobe Illustrator More...	Business Skills Advertising Techniques Business Accounting Basics Business Strategy Human Resource Management Marketing Basics More...
Soft Skills Body Language People Skills Public Speaking Persuasion Job Hunting And Resumes More...	Vocabulary GRE Vocab SAT Vocab TOEFL Essential Vocab Basic English Words For All Global Words You Should Know Business English More...	Languages AP German Vocab AP Latin Vocab SAT Subject Test: French Italian Survival Norwegian Survival More...	Engineering Audio Engineering Computer Science Engineering Aerospace Engineering Chemical Engineering Structural Engineering More...
Health Sciences Basic Nursing Skills Health Science Language Fundamentals Veterinary Technology Medical Language Cardiology Clinical Surgery More...	English Grammar Fundamentals Literary And Rhetorical Vocab Elements Of Style Vocab Introduction To English Major Complete Advanced Sentences Literature Homonyms More...	Math Algebra Formulas Basic Arithmetic: Measurements Metric Conversions Geometric Properties Important Math Facts Number Sense Vocab Business Math More...	Other Major Subjects Science Economics History Law Performing-arts Cooking Logic & Reasoning Trivia

Test your basic knowledge |

GRE Physics

Can you answer 50 questions in 15 minutes?

Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests

Major Subjects

Tests & Exams

Certifications

IT Skills

Business Skills

Soft Skills

Vocabulary

Languages

Engineering

Health Sciences

English

Math

Other Major Subjects

Browse all subjects

Browse all tests

Most popular tests