A light bulb glows because it has resistance. The brightness of a light bulb increases with the electrical power dissipated in the bulb, (a) In the circuit shown in Fig. Q25.14a , the two bulbs A and B are identical. Compared to bulb A , does bulb B glow more brightly, just as brightly, or less brightly? Explain your reasoning, (b) Bulb B is removed from the circuit and the circuit is completed as shown in Fig. Q25.l4b. Compared to the brightness of bulb A in Fig. Q25.l4a, does bulb A now glow more brightly, just as brightly, or less brightly? Explain your reasoning. Figure Q25.14
A light bulb glows because it has resistance. The brightness of a light bulb increases with the electrical power dissipated in the bulb, (a) In the circuit shown in Fig. Q25.14a , the two bulbs A and B are identical. Compared to bulb A , does bulb B glow more brightly, just as brightly, or less brightly? Explain your reasoning, (b) Bulb B is removed from the circuit and the circuit is completed as shown in Fig. Q25.l4b. Compared to the brightness of bulb A in Fig. Q25.l4a, does bulb A now glow more brightly, just as brightly, or less brightly? Explain your reasoning. Figure Q25.14
A light bulb glows because it has resistance. The brightness of a light bulb increases with the electrical power dissipated in the bulb, (a) In the circuit shown in Fig. Q25.14a, the two bulbs A and B are identical. Compared to bulb A, does bulb B glow more brightly, just as brightly, or less brightly? Explain your reasoning, (b) Bulb B is removed from the circuit and the circuit is completed as shown in Fig. Q25.l4b. Compared to the brightness of bulb A in Fig. Q25.l4a, does bulb A now glow more brightly, just as brightly, or less brightly? Explain your reasoning.
51. The switch in Figure P27.51a closes when A,>AV_and opens when AV,
A lamp with a filament resistance of 230 ohms is switched on at peak hours when the voltage is only 210 volts.
a. How much current is passing through the lamp?
b. Later in the night, the voltage rises to 220 volts. How many amperes in the lamp now using?
c. What filament resistance should a lamp have if the voltage was raised to 230 volts but the same current in b was used?
A parallel plat capacitor is being charged by a battery of Ɛ = 12 V. If the total resistance of the circuit is 5.0 k2,
and if the time constant for this circuit is 7= 95 ms (milliseconds), then:
1.
What is the capacitance, C, of the capacitor?
а)
b)
What is electric charge on the capacitor (as a function of time)?
c)
What is the current in the circuit (as a function of time)?
d)
If the capacitor plates are circular and the separation distance is d = 0.8 mm, calculate the E field value
between the plates of the capacitor (as a function of time).
e)
Calculate the B field value and directions, between the plates of the capacitor (as a function of time), at a
distance r from the center of plates.
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DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY