At the moment contact is made with the battery, the voltage across the inductor is zero
At the instant the switch is closed, there is no current in the resistor (the inductor has prevented that), and therefore, there is no voltage across the resistor
<h3>What is Voltage ?</h3>
When charged electrons (current) are forced through a conducting loop by the pressure of an electrical circuit's power source, they can perform tasks like lighting a lamp. In a nutshell, voltage equals pressure and is expressed in volts (V).
- DC voltage and AC voltage are the two different types of voltage. In a battery, for example, the DC voltage (direct current voltage) is always of the same polarity (positive or negative). Positive and negative waves interchange within the AC voltage (alternating current voltage).
Learn more about Voltage here:
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The third one should do the trick
I can't tell right away. The elevator's limit is given in terms of mass, but the four people are listed in terms of their weights. In order to compare them, we'll have to convert one or the other.
The total of the four people's weights is:
John . . . . . . . 850N
Betty . . . . . . . 530N
Robert . . . . . . 740N
Alice . . . . . . . .610N
Total . . . . . . 2,730N
The elevator can't accept more than 300 kg of mass.
The weight of any mass is (mass) x (gravity).
On Earth, 300kg weighs (300kg) x (9.8 m/s²) = 2,940 N.
Wonderful !
2,730N is less than 2,940N.
<em>Yes !</em> According to Otis' engineers, John, Betty, Robert and Alice <em>can safely ride the elevator together</em>, (although Betty and Alice may have a different opinion).