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Find the angular frequency in a RC-circuit at which the phase difference between the current and voltage becomes 45˚.
One fateful winter evening, Orion the Hunter was found to have just crossed the local meridian.
Given that Alnilam, the middle star of the 3 along the “Belt of Orion” has RA/DEC: 5h 36
min/ ́1
̋1211
2
, what is the local sidereal time at that instance?
A charged Q of 2.5uC is in two dimensional electric field with horizontal and vertical components of 35.0 N/C and 52.0 N/C, respectively. Find the magnitude and direction of the electric force on charge Q.
Two point charges q1 = +2 N.C and q2= -3N.C are separated in air. Where is the neutral point?
2. The capacitors have values C₁ = 2.0 μF and C₂ = 4.0 μF, C₂ = 5.0 μF C4 = 7.0 μF and the potential difference across the battery is 9.0 V. Assume that the capacitors are connected in series.
a) Find the equivalent capacitance of the circuit.
b) Solve for the potential difference across each capacitors.
3. Given the same problem in #2. Assume that the capacitors are connected in parallel.
a) Find the equivalent capacitance of the circuit.
b) Solve for the charge across each capacitors.
The capacitors have values C₁ = 2.0 μF and C₂ = 4.0 μF, C₂ = 5.0 μF C4 = 7.0 μF and the potential difference across the battery is 9.0 V. Assume that the capacitors are connected in series.
a) Find the equivalent capacitance of the circuit.
b) Solve for the potential difference across each capacitors.
b) A 20kg mass of Aluminum of specific heat Capacity OF 900kg /k was heated from 2k to 12k. Determine the
amount of heat Energy required
A person’s right eye can see objects clearly only if they are between 25 cm and 75 cm away. (a) What power of contact lens is required so that objects far away are sharp? (b) What will be the near point with the lens in place
A capacitor is used in a typical flash for a “point-and-shoot” camera. The figure shows a circuit for a camera flash, where a 1.5V cell battery is charging the 2000 μF capacitor. When a flash is required, the energy stored in the capacitor is made to discharge through a discharge tube in0.001 s, giving a powerful flash.
- If we change the battery into a 5.0V cell, instead of using 1.5V cell, how much energy will be stored in the capacitor?
- If the flash lasts for about 0.001 s, what is the power delivered by the capacitor during this brief time?
Find the magnitude of the electrostatic force of attraction between an iron nucleus, Fe and its innermost orbiting electron if the distance of separation between them is 1.50 x 10^-12 m. Determine also the orbital speed of this electron.
