Question 1

Which of the following best describes the physical meaning of electric charge?

Accepted Answer

It is a property of matter that causes it to experience a force when placed in an electric field.

Question 2

A point charge $$q is $$placed at the center of a spherical conducting shell. If the shell has a net charge of $$Q$$, what is the total charge on the outer surface of the shell?

Accepted Answer

$$Q$$

Question 3

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

Accepted Answer

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

Question 4

A parallel plate capacitor is connected to a battery. If the distance between the plates is doubled while keeping the charge constant, what happens to the electric field between the plates?

Accepted Answer

It remains the same.

Question 5

Which of the following is the correct expression for the energy stored in a capacitor with capacitance $$C$$ and voltage $$V$$?

Accepted Answer

$$U = \frac{1}{2}CV^2$

Question 6

A resistor of $$10\,\Omega is $$connected in series with a $$5\,\Omega$$ resistor and a $$12\,V$$ battery. What is the current in the circuit?

Accepted Answer

$$0.6\,A$$

Question 7

Which of the following best describes the function of a dielectric in a capacitor?

Accepted Answer

It increases the capacitance by reducing the electric field between the plates.

Question 8

A wire carries a current $$I in a $$uniform magnetic field $$B. $$Which equation gives the magnitude of the force on a length $$L of $$the wire?

Accepted Answer

$$F = ILB$$

Question 9

A charged particle moves perpendicular to a uniform magnetic field. Which path will the particle follow?

Accepted Answer

A circular path.

Question 10

Which of the following is the correct expression for the magnetic flux $$\Phi$$ through a surface of area $$A in a $$uniform magnetic field $$B at an $$angle $$	heta$$?

Accepted Answer

$$\Phi = BA \cos 	heta$$

Question 11

A coil of wire with $$N$$ turns and area $$A is $$rotated in a uniform magnetic field $$B at $$angular speed $$\omega. $$What is the maximum induced emf?

Accepted Answer

$$\varepsilon_{max} = NAB\omega$$

Question 12

Which law states that the induced emf in a circuit is proportional to the rate of change of magnetic flux through the circuit?

Accepted Answer

Faraday's Law

Question 13

A transformer has 100 turns on the primary coil and 20 turns on the secondary coil. If the input voltage is $$120\,V$$, what is the output voltage?

Accepted Answer

$$24\,V$$

Question 14

Which of the following is the correct expression for the capacitance of a parallel plate capacitor with plate area $$A$$, separation $$d$$, and dielectric constant $$\kappa$$?

Accepted Answer

$$C = \kappa \$$varepsilon_0$$ \frac{A}{d}$$

Question 15

A $$2\,\mu F$$ capacitor and a $$4\,\mu F$$ capacitor are connected in series. What is the equivalent capacitance?

Accepted Answer

$$1.33\,\mu F$$

Question 16

Which of the following best explains why the current in a resistor is proportional to the voltage across it?

Accepted Answer

Because the resistance is constant, as described by Ohm's Law.

Question 17

A $$3\,\Omega$$ resistor and a $$6\,\Omega$$ resistor are connected in parallel. What is the total resistance?

Accepted Answer

$$2\,\Omega$$

Question 18

Which of the following is the correct expression for the force between two parallel current-carrying wires separated by distance $$r$$?

Accepted Answer

$$F = \frac{\mu_0$ I_1$ I_2$}{2\pi r} L$$

Question 19

A patient receives an electric shock of $$0.1\,A$$ for $$0.5\,s. If $$the resistance of the body is $$1000\,\Omega$$, what is the energy dissipated?

Accepted Answer

$$5\,J$$

Question 20

Which of the following is a real-world application of electromagnetic induction?

Accepted Answer

Electric generators converting mechanical energy to electrical energy.

General Physics II: Course Schedule and Topic Overview

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