1·Three charges, q-qr and q, are fixed on the three points shown below. Charges,

Question

1·Three charges, q-qr and q, are fixed on the three points shown below. Charges, -* C, and charge q,-+ 49 ?C. Determine the magnitude and direction ofthe net electrostatic force on charge q, due to the other two charges. ( 1 OC-10x 0, e ) 0.80 m 60 91 0.70 m 2. In the Figure below. R'-5.0 ?, R2-862, R,-12 ?, R.-24 ?, Rs-8.0 ? and R.-70n. Find (a) the equivalent resistance, (b) the current through the resistor R, () the current through the resistor Ry and (c) the current through the resistor R, The voltage of the source, V- 144 V. Ri R3 2 R4 R. tha normal to the plane

Explanation / Answer

2)

Since R3, R4 and R5 are in parallel connection,

1/R' = (1/12) + (1/24) + (1/8)

R' = 4 ohm

So equivalent resistance, Req = 4 + 5 + 8 + 7 = 24 ohm

B) Current in circuit I = V/Req = 144/24 = 6 A

C) current in R' = 6 A

Voltage in R' = 6 x 4 = 24 V

So current in R3, I3 = 24/8 = 3 A

D) Current through R6, I6 = 6 A

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