Flash Cards – Quick Revision
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What is Ohm’s Law?
Ohm’s law states that current is directly proportional to voltage at constant temperature. V = IR.
What is electric current?
Electric current is the rate of flow of electric charge.
Two point charges, one of 4μC and the other of −4μC, are separated by a distance of 0.3 m. Calculate the electrostatic force between them.
The force is 1.6 N, and it is an attractive force.
A charge of 5μC is placed in a uniform electric field with an intensity of 2×10 5 N/C. What is the magnitude of the force experienced by the charge?
The force experienced is 1 N.
What is the electric field intensity at a point 20 cm away from a point charge of 8μC?
The electric field intensity is 1.8×10 6 N/C.
A nucleus contains 10 protons and 10 neutrons, and its binding energy per nucleon is 8 MeV. What is the total binding energy of the nucleus?
The total binding energy is 160 MeV.
According to the Bohr model of the atom, what is the energy of the photon emitted when an electron transitions from the n=2 energy level to the n=1 energy level?
The energy emitted is 10.2 eV.
During a photoelectric effect experiment, the stopping potential is measured to be 2 V. What is the maximum kinetic energy of the emitted electrons?
The maximum kinetic energy is 2 eV.
In Young’s double-slit experiment, light of wavelength λ=600 nm is used. The slits are separated by d=0.3 mm, and the screen is D=1 m away. Calculate the fringe width.
The fringe width is 2 mm.