Question

Question 1

Which of the following are true statements about the electric field?

		Equipotential lines imply magnitude and direction of the electric field.
		The electric field inside a spherical conducting shell in 3D is zero.
		If the electric field inside a conductor is nonzero, charges must not be moving; that is, there is a zero current.
		The direction of the electric field is the direction of acceleration of a positive test charge.
		The electric lines of force indicate the vector force experienced by a positive test charge released at a particular point.
		The electric field is a vector field that is found by taking the gradient of the negative potential.
		No electric field exists between the plates of a charged capacitor.
		The electric field is a charge-specific force field independent of any test charge.
		The electric field points towards a negative charge and away from a positive charge.
		A moving charge produces a magnet anomaly.

10 points   

Question 2

Which of the following are true statements about how magnetism is like electricity?

		Single magnetic poles exist, just like single electric charges.
		Magnetic circuits can be created, just like electric circuits.
		The magnetic field lines around a magnet are just like the electric field lines around an electric dipole.
		Opposites attract and likes repel; poles for magnetism, charges for electricity.
		Cutting a magnet in half always produces two smaller magnets, just like cutting a charge in half always creates two smaller charges.

5 points   

Question 3

What is Faraday’s Law?

		It gives the direction of the induced current going through a coil when the magnetic field going through it changes.
		The sum of all the voltage drops going around any loop in a circuit has to equal zero.
		The sum of all the current going into a junction has to equal the sum of all the currents coming out.
		The potential difference across a resistor is proportional to both the resistance and the current going through it
		It defines the induced voltage across a coil when the magnetic field going through it changes.

5 points   

Question 4

How does the magnetic field in the center of a solenoid change when the number of turns of the single wire is tripled?

		It doesn’t change because the field is always zero in the center.
		The magnetic field decreases to one third of the original.
		It doesn’t change because it’s still only one wire.
		It depends on the number of turns of the secondary.
		Edge effects and self-induction keep the magnetic field to double the original.
		The magnetic field triples.

Answer 1

Which of the following are true statements about the electric field?

		Equipotential lines imply magnitude and direction of the electric field. True
		The electric field inside a spherical conducting shell in 3D is zero. True
		If the electric field inside a conductor is nonzero, charges must not be moving; that is, there is a zero current. False
		The direction of the electric field is the direction of acceleration of a positive test charge. True
		The electric lines of force indicate the vector force experienced by a positive test charge released at a particular point. True
		The electric field is a vector field that is found by taking the gradient of the negative potential. True
		No electric field exists between the plates of a charged capacitor. False
		The electric field is a charge-specific force field independent of any test charge. True
		The electric field points towards a negative charge and away from a positive charge. true
		A moving charge produces a magnet anomaly. true