SSM An ac generator has emf ℰ = ℰ m sin( ω d t = π /4), where ℰ m = 30.0 V and ω d = 350 rad/s. The current produced in a connected circuit is i(t) = I sin ( ω d t = 3 π/ 4 ), where I = 620 mA. At what time after t = 0 does (a) the generator emf first reach a maximum and (b) the current first reach a maximum? (c) The circuit contains a single element other than the generator. Is it a capacitor, an inductor, or a resistor? Justify your answer. (d) What is the value of the capacitance, inductance, or resistance, as the case may be?
SSM An ac generator has emf ℰ = ℰ m sin( ω d t = π /4), where ℰ m = 30.0 V and ω d = 350 rad/s. The current produced in a connected circuit is i(t) = I sin ( ω d t = 3 π/ 4 ), where I = 620 mA. At what time after t = 0 does (a) the generator emf first reach a maximum and (b) the current first reach a maximum? (c) The circuit contains a single element other than the generator. Is it a capacitor, an inductor, or a resistor? Justify your answer. (d) What is the value of the capacitance, inductance, or resistance, as the case may be?
SSM An ac generator has emf ℰ = ℰm sin(ωdt = π/4), where ℰm = 30.0 V and ωd= 350 rad/s. The current produced in a connected circuit is i(t) = I sin (ωdt = 3
π/
4), where I = 620 mA. At what time after t = 0 does (a) the generator emf first reach a maximum and (b) the current first reach a maximum? (c) The circuit contains a single element other than the generator. Is it a capacitor, an inductor, or a resistor? Justify your answer. (d) What is the value of the capacitance, inductance, or resistance, as the case may be?
Consider a rubber rod that has been rubbed with fur to give the rod a net negative charge, and a glass rod that has been rubbed with silk to give it a net positive charge. After being charged by contact by the fur and silk...?
a. Both rods have less mass
b. the rubber rod has more mass and the glass rod has less mass
c. both rods have more mass
d. the masses of both rods are unchanged
e. the rubber rod has less mass and the glass rod has mroe mass
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