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Electricity and Magnetism
Why there should be a relationship between electrical conduction and heat conduction in materials.
Electricity and Magnetism
in a step down transformer, which is higher the output voltage or the input voltage
Electricity and Magnetism
For an interference pattern to be observed between two sources, the emission must be coherent.
i. State the characteristic for the coherent sources.
ii. A light source is directed through two narrow slits separated at 5 x 10 m. Five meters away from the wall is a light detector which detects the interference pattern. It was found that the distance from the central peak to the first order interference fringes was 6 cm. What is the light source's wavelength?
iii. Recommend a suitable modification to the setup so that the distance between two consecutive fringes is increased.
i. State the characteristic for the coherent sources.
ii. A light source is directed through two narrow slits separated at 5 x 10 m. Five meters away from the wall is a light detector which detects the interference pattern. It was found that the distance from the central peak to the first order interference fringes was 6 cm. What is the light source's wavelength?
iii. Recommend a suitable modification to the setup so that the distance between two consecutive fringes is increased.
Electricity and Magnetism
Magnet A has thrice the magnetic field strength of magnet B and at a certain distance pulls on magnet B with a force of 100 Newtons. With how much force, then, does magnet B pull on magnet A? What is the force if the distance between the magnets is doubled?
Electricity and Magnetism
The current flowing inside a copper wire of cross-sectional area 0.240cm2 and length 0.99m is 340 A Given that the number of charge carriers per unit volume is 8.49 × 1028 m-3 , Calculate the time taken for the electrons to move from the car battery to the starting motor
Electricity and Magnetism
What is capacitance
Electricity and Magnetism
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Electricity and Magnetism
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Electricity and Magnetism
A transformer has 500 primary turns and 200 secondary turns. The primary and secondary resistances
are 0.3Ω and 0.02Ω respectively and the corresponding leakage reactance are 2Ω and 0.05Ω
respectively. Determine:
(a) the equivalent resistance and reactance referred to the primary side
(b) the equivalent resistance and reactance referred to the primary side, impedance summed
(c) the output power factor
(d) draw the equivalent circuit referred to the primary side, impedance summed
(e) input and output apparent power
are 0.3Ω and 0.02Ω respectively and the corresponding leakage reactance are 2Ω and 0.05Ω
respectively. Determine:
(a) the equivalent resistance and reactance referred to the primary side
(b) the equivalent resistance and reactance referred to the primary side, impedance summed
(c) the output power factor
(d) draw the equivalent circuit referred to the primary side, impedance summed
(e) input and output apparent power
Electricity and Magnetism
Two points charges are placed on the x-axis: a – 6 µC charge at x = 0 and a + 5µC charge at x = 200 cm. At
what point(s) in the vicinity of these two charges can a + 5- µC charge be placed to that it experiences no
resultant force?
what point(s) in the vicinity of these two charges can a + 5- µC charge be placed to that it experiences no
resultant force?
