Please help. I'm a bit confused.
James has a simple circuit that consists of a 70V source that is in series with a 2000Ω resistor, and an open space between two terminals, A and B, across which is a potential difference (PD) of V1. With a body resistance of 5000Ω across his hands, James simultaneously touches terminals A and B with his hands, resulting in a PD of V2 across terminals A and B.
Is V1 less than, more than, or equal to V2?
James has a simple circuit that consists of a 70V source that is in series with a 2000Ω resistor, and an open space between two terminals, A and B, across which is a potential difference (PD) of V1. With a body resistance of 5000Ω across his hands, James simultaneously touches terminals A and B with his hands, resulting in a PD of V2 across terminals A and B.
Is V1 less than, more than, or equal to V2?
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Less than. The body puts another resistance in series, and completes the circuit. Thus current flows, and a V drop across the 2k ohm resistor occurs.
Did you need it worked out?
Open circuit, V1 is 70V.
Total resistance = 7k ohms.
Current I = E/R, = 70/7,000, = 0.01A.
V drop across 2k = IR, = 0.01 x 2,000, = 20V.
The V across the gap has decreased by 20V., to 50V.
Did you need it worked out?
Open circuit, V1 is 70V.
Total resistance = 7k ohms.
Current I = E/R, = 70/7,000, = 0.01A.
V drop across 2k = IR, = 0.01 x 2,000, = 20V.
The V across the gap has decreased by 20V., to 50V.