Part A Calculate the equivalent resistance of the circuit. Express your answer w

Question

Part A

Calculate the equivalent resistance of the circuit.

Express your answer with the appropriate units.

Part B

Calculate the electric potential at position a.The electric potential of the lower wire is zero.

Express your answer with the appropriate units.

Part C

Determine the current through the R1 = 900 .

Express your answer with the appropriate units. Enter positive value if the current through the resistor is directed to the right and negative value if the current through the resistor is directed to the left.

Part D

Determine the current through the resistor R2 = 1500 .

Express your answer with the appropriate units. Enter positive value if the current through the resistor is downward and negative value if the current through the resistor is upward.

Part E

Determine the current through the 1200- resistor.

Express your answer with the appropriate units. Enter positive value if the current through the resistor is downward and negative value if the current through the resistor is upward.

Part F

Determine the current through the 900- resistor in the rightmost branch.

Express your answer with the appropriate units. Enter positive value if the current through the resistor is downward and negative value if the current through the resistor is upward.

Part G

Calculate the magnitude of the current through the 300- resistor in the rightmost branch.

Express your answer with the appropriate units. Enter positive value if the current through the resistor is downward and negative value if the current through the resistor is upward.

Explanation / Answer

a )

from fig

900 and 300 are in series

R1 = 900 + 300

R1 = 1200

and 1200 and 1200 are the parallel

1 / R2 = ( 1 / 1200 + 1 / 1200 )

1 / R2 = 1 / 600

R2 = 600

now R1 and 600 are in series

R3 = 600 + 1200

R3 = 1500

1500 and R2 are in parallel

1 / Req = 1 / 1500 + 1 / 600

Req = 750

b )

voltage is not mentioned so taken it is V = 30 volts

current i = 1 / 1500 = 0.02 A

V = 600 X 0.02 = 12 volts

i = 12 / 1200

i = 0.01 A

V300 = 0.01 X 300 = 3 volts

Va = 3 volts

c )

i = 30 / 900

i = 0.033 A

d )

i = 30 / 1200

i = 0.025 A

e )

i = 30 / 1500

i = 0.02 A

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