Q: A $$5 \ \mu\mathrm{F}$$ capacitor is charged to $$10 \ \mathrm{V}. $$What is the energy stored in the capacitor?

$$2.5 \times 10$$^{-4}$$ \ \mathrm{J}$$

Question 1

A 2 kg ball moving at 5 m/s collides elastically with a stationary 3 kg ball. What is the velocity of the 2 kg ball after the collision?

Accepted Answer

$$v = -2 \ \mathrm{m/s}$$

Question 2

Which of the following best describes the force that keeps a satellite in circular orbit around Earth?

Accepted Answer

Gravitational force acting as a centripetal force

Question 3

A car of mass $$m$$ travels around a flat circular track of radius $$r at $$constant speed $$v. $$What is the required frictional force to keep the car moving in a circle?

Accepted Answer

$$F = \frac{mv^2$}{r}$$

Question 4

Which equation correctly expresses Coulomb's Law for the force between two point charges $$q_1$$ and $$q_2$$ separated by distance $$r$$?

Accepted Answer

$$F = k \frac{q_1$ q_2$}{r^2$}$$

Question 5

A parallel plate capacitor is charged to a voltage $$V$$ and then disconnected from the battery. If the plate separation is doubled, what happens to the stored energy?

Accepted Answer

It decreases to one-fourth

Question 6

Which of the following best describes the function of a cyclotron?

Accepted Answer

It accelerates charged particles using electric and magnetic fields

Question 7

A proton enters a uniform magnetic field at right angles to the field lines. What is the path of the proton?

Accepted Answer

A circular path

Question 8

Which of the following is true about the energy lost in an inelastic collision?

Accepted Answer

It is converted into other forms such as heat and sound

Question 9

What is the time constant $$	au$$ for an $$RC$$ circuit?

Accepted Answer

$$	au = RC$$

Question 10

Which particle is exchanged in the electromagnetic interaction according to the Standard Model?

Accepted Answer

Photon

Question 11

A metal rod moves perpendicular to a uniform magnetic field at velocity $$v. $$What is the induced emf across the ends of the rod of length $$l$$?

Accepted Answer

$$\varepsilon = Blv$$

Question 12

Which of the following statements about antimatter is correct?

Accepted Answer

Antimatter particles have the same mass and opposite charge as their matter counterparts

Question 13

Which of the following is NOT a property of an electric field?

Accepted Answer

It always points away from negative charges

Question 14

A $$5 \ \mu\mathrm{F}$$ capacitor is charged to $$10 \ \mathrm{V}. $$What is the energy stored in the capacitor?

Accepted Answer

$$2.5 	imes 10$$^{-4}$$ \ \mathrm{J}$$

Question 15

Which of the following best describes the role of the Large Hadron Collider (LHC)?

Accepted Answer

It accelerates protons to near light speed and collides them to study fundamental particles

Question 16

Which of the following is a baryon?

Accepted Answer

Proton

Question 17

A current-carrying wire is placed in a magnetic field. What is the direction of the force on the wire?

Accepted Answer

Perpendicular to both the current and the magnetic field

Question 18

Which of the following is true about the conservation of momentum in collisions?

Accepted Answer

Momentum is always conserved in isolated systems

Question 19

Which of the following is a correct statement about the weak nuclear force?

Accepted Answer

It is responsible for beta decay

Advanced Physics Study Notes: Further Mechanics, Electric & Magnetic Fields, and Nuclear & Particle Physics

Guida di studio - Domande di pratica

Study guide - Flashcard