Year 12 Physics Revision

Question 1

What is the acceleration of the system across assuming no friction?

Accepted Answer

3.3 m/s2

Question 2

What is the key takeaway message that Leon wants you to take from Physics going forward?

Accepted Answer

Be curious, skeptical and keep learning

Question 3

Which of the following is a Postulate of Special Relativity?

Accepted Answer

Laws of physics same in all inertial reference frames

Question 4

A ball is thrown at angle 30 degrees with u=20m/s. What is the maximum height of the ball?

Accepted Answer

5.1 m

Question 5

What is the uncertainty in net force, if m=12kg +/- 1 kg and a=5m/s2 +/- 0.5m/s2

Accepted Answer

11 N

Question 6

What is the work performed using this diagram across?

Accepted Answer

2500J

Question 7

What is the angle of refraction if n1=1.2 n2=1.5 and angle of incidence is 40 degrees?

Accepted Answer

31 degrees

Question 8

What is the kinetic energy of an electron accelerated through a potential of 12 kV if u=0m/s?

Accepted Answer

12000 eV

Question 9

What is the radius of an electron through B-field=0.2mT travelling at 107 m/s?

Accepted Answer

0.284 m

Question 10

Which concepts should you use for DC Motors and AC Generators?

Accepted Answer

DC Motor - Lorentz Force. AC Gen - Faraday's Law

Question 11

A spring with k=2000N/m is compressed 5 cm. What is energy stored in the spring?

Accepted Answer

2.5 J

Question 12

Light of wavelength 400 nm travels through a d = 2 cm & L=10 m. What is the fringe spacing?

Accepted Answer

0.2 mm

Questions 12