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1.Find I when V = 120V and R = 3O Ω.
2. Suppose a resistor has a value of 110 Ω, and the measured current is 10 mA, what is the
voltage?
3. What is the resistance of a 50-m tungsten (ρ=5.5x10⁻⁸ Ω-m) wire having a diameter of
0.8 mm.
4. An electric light bulb draws 1 A when operating at 120 V circuit. What is the resistance
of the bulb?
5. If the voltage across a 25 000-Ω resistor is 500 V, what is the power (hp) dissipated in
the resistor?
6. Find the shortest time that 120 C can flow through a 20 A circuit breaker without
tripping it?
7. How much chemical energy must a 1.25 V flashlight battery expend in producing a
current flow of 130 mA for 5 minutes?
8. Find the charge in coulombs of (a) 6.28 x 10²¹ electrons and (b) 8.76 x 10²⁰ protons.
9. How much power does an electric clock require if it draws 27.3 mA from a 110-V line?
10. Find the average input power to a radio that consumes 4500 J in 3 min.
An electron in a Mercury atom is at the 'g' energy level and returns to the 'd' energy level. List how many possible photons may be emitted by the electron as it returns to the 'd' energy level.
A newly discovered particle is found to have a quark composition of anti-bottom, up. What is the charge of this particle, in Coulombs?
What is grounding? What effect does it have on a charged conductor? On a charged insulator?
Describe how a positively charged object can be used to give another object a negative charge? What is the name of this process
What will be the energy of the 5th orbit of hydrogen atom if the energy of the 1st orbit of this atom is 13.6 eV?
In co, the J=0 →J=1 transition, absorption occurs at forequency 1-15x10" Hz. Moment of Inertia of the molecule is ? (b) find the Bondlength of the Co molecule.
What is the distance between two protons so that their Coulomb potential is barrier potential 200 keV
can something be created out of nothing?
in 180 minutes, the activity of a certain radioactive substance falls to 1/8 its original value. calculate its half life
#339914 on Dec 2023