What is the maximum possible power dissipated in the variable resistor R?
Maximum power is dissipated across a variable external resistance when that external resistance(R) matches the internal resistance(r) and when this happens the value of maximum power is equal to E2/4r.
When an external resistor R is connected to an electrical cell with emf E and an internal resistor R the maximum power dissipated will be?
Rl = r. So that current output will be = E/(r+Rl )= E/2r . Power dissipation will be = ( E^2)/ 2r.
What is the value of resistance R which will allow maximum power dissipation in the circuit?
Condition for Maximum Power Transfer Therefore, the condition for maximum power dissipation across the load is RL=RTh. That means, if the value of load resistance is equal to the value of source resistance i.e., Thevenin’s resistance, then the power dissipated across the load will be of maximum value.
When a battery of emf E and internal resistance R is connected across external resistance R the power consumed in R is Max when r/r is?
Related Videos If a battery of emf E and internal resistance r is connected across a load of resistance R. Shot that the rate at which energy is dissipated in R is maximum when R=r and this maximur power is P=E2/4r.
What is maximum power dissipation?
Maximum Power Dissipation indicates a component’s maximum capability to transfer and conduct this power loss without overheating. power dissipation and is measured in Watts.
Why power is maximum when internal resistance is equal to external resistance?
If we have to find the maximum power output then it will be differentiated with respect to $R$ and then make it equal to zero and substitute the value of $R$ to get the maximum value of power output. So, the power will be maximum when the value of external resistance is equal to the value of internal resistance.
When a DC battery of emf E and internal resistance R delivers maximum power to an external resistance R the ratio r/r is?
r=1/R.
How cells are combined find expression for the maximum current in each case of combination?
Maximum current can be drawn from series combination of cells if external resistance is very large as compared to equivalent internal resistance. So current I = Σ E i R + Σ r i .
When a DC battery of emf E and internal resistance R delivers maximum power to an external resistance R?
A battery of e.m.f. E and internal resistance r is connected to an external resistance R the condition for maximum power transfer is. r < R. r > R. r = 1/R.
How do you find the maximum power?
Step 1: Remove the load resistance of the circuit. Step 2: Find the Thevenin’s resistance (RTH) of the source network looking through the open-circuited load terminals. Step 3: As per the maximum power transfer theorem, RTH is the load resistance of the network, i.e., RL = RTH that allows maximum power transfer.
What is power dissipation capability?
The ability of a power transistor to dissipate heat is known as power dissipation capability . To achieve this, generally a heat sink (a metal case) is attached to a power transistor case. the increased surface area allows heat to escape easily and keeps the case temperature of the transistor within permissible limits.