Question

1. Mark the correct answer.

Select one:

a. The resistivity of a superconductor is infinite.

b. The resistivity of a conductor increases as the temperature decreases.

c. None of the other options is correct.

d. The electric current is the rate of flow of electric charge, I=ΔQ/ΔtI=ΔQ/Δt.

2. Mark the correct statement.

Select one:

a. None of the other options is correct.

b. A compass needle must be made out of ferromagnetic material.

c. A compass needle need not be made out of a ferromagnetic material, but it must be a material that can have an induced magnetic field.

3. Mark the correct statement.

Select one:

a. In fusion power two light nuclei, such as a deuterium and tritium atom undergo a nuclear fusion reaction to create He-4 and release 17 MeV of energy.

b. In fusion power a uranium-235 nucleus undergoes is split in a chain reaction to produce heat.

4. Mark the correct statement.

Select one:

a. The electric field in the center between two large parallel metal plates a distance dd apart with a voltage VV between them is: E=VdE=Vd.

b. The electric field is directed from negative to positive.

c. None of the other options is correct.

d. The electric field in the center between two large parallel metal plates a distance dd apart with a voltage VV between them is: V=EdV=Ed.

5.Mark the correct statement

Select one:

a. All radioactivity is of anthroprogenic origin.

b. The radius of a typical atomic nucleus is about 100 km.

c. Neutrinos are emitted during ββ radioactive decay.

d. Neutrinos (and antineutrinos) are almost 100% stopped by a piece of paper.

e. None of the other options is correct.

Answer 1

1> The electric current is the rate of flow of electric charge, I=ΔQ/ΔtI=ΔQ/Δt.

2> A compass needle need not be made out of a ferromagnetic material, but it must be a material that can have an induced magnetic field

3> In fusion power two light nuclei, such as a deuterium and tritium atom undergo a nuclear fusion reaction to create He-4 and release 17 MeV of energy.

4> The electric field in the center between two large parallel metal plates a distance dd apart with a voltage VV between them is: V=EdV=Ed.

5>Neutrinos are emitted during ββ radioactive decay.