Three resistors with values 0.90? , 2.9? , and 4.2? are connected in parallel in
ID: 3894722 • Letter: T
Question
Three resistors with values 0.90? , 2.9? , and 4.2? are connected in parallel in a circuit with a 6.4V battery.1)What is the total equivalent resistance? 2)What is the voltage across each resistor? What is the power delivered to the 4.2? resistor?
(Express your answers using two significant figures.) Three resistors with values 0.90? , 2.9? , and 4.2? are connected in parallel in a circuit with a 6.4V battery.
1)What is the total equivalent resistance? 2)What is the voltage across each resistor? What is the power delivered to the 4.2? resistor?
(Express your answers using two significant figures.)
Explanation / Answer
R eq = 0.9 || 2.9 || 4.2
= ( 0.9 * 2.9) / ( 2.9 + 0.9) || 4.2
= 0.59 Ohms
Voltage across each resistor is same = 6.4 V
Power delivered to 4.2 Ohms resistor = V^2/R = 6.4^2 / 4.2
= 9.752 Watts