For the DC cicuit show below, find the voltage and current across each resistor.

Question

For the DC cicuit show below, find the voltage and current across each resistor. The voltage source is 40V. Find the power dissipations in R1 and R3.                 

                 

Ra= 12 ohms, Rb = 100 ohms, Rc= 200 ohms, Rd = 70 ohms.                 

Current through Rb                     = A
Voltage drop across RbRB                     = V


Current through RcRC                     = A
Voltage drop across Rc RC = V
Power dissipation in RcRC                     = W


Current through Rd =A
Voltage drop across Rd = V                  

For the DC cicuit show below, find the voltage and current across each resistor. The voltage source is 40V. Find the power dissipations in R1 and R3. Ra= 12 ohms, Rb = 100 ohms, Rc= 200 ohms, Rd = 70 ohms.

Explanation / Answer

net resistanc = 12 + 70*300/370

= 68.75 ohm

net current = 40/68.75 = 0.58 A

Current through Rb = 0.58*70/370 = 0.11 A

Voltage drop across Rb = 0.11*100 = 11 V

Current through Rc = Current through Rb = 0.11 A

Voltage drop across Rc = 0.11*200 = 22 V

Power dissipation in Rc = 22*0.11 = 2.42 W

Current through Rd = 0.58*300/370 = 0.47 A

Voltage drop across Rd = 0.47*70 = 32.9 V

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