Current Electricity - Battery|Resistor|Questions|Maximum Power

Battery and Maximum Power Theorem

The domestic power supply of 220 V, 50 Hz is connected to a resistor. What is the time taken by the alternating current flowing in the resistor, to change from its maximum value to turns value?

A battery of emf epsilon and internal resistance r is connected across a pure resistance device (e.f. and electric heater or an electric bulb) of resistance R. Show that the power output of the device is maximum when there is a perfect 'mathcing' between the external resistance adn the source resistance (i.e., where R=r). Determine the maximum power outpur. Or State and prove the maximum power theorem. show that the effciency of a battery when delivering maximum power is only 50% (b) What is power output of the source abvoe if the battery is hosrted? what is the power dissipation inside the battery in that case?

A battery of emf epsilon and internal resistance r is connected across a pure resistance device (e.f. and electric heater or an electric bulb) of resistance R. Show that the power output of the device is maximum when there is a perfect 'mathcing' between the external resistance adn the source resistance (i.e., where R=r). Determine the maximum power outpur. Or State and prove the maximum power theorem. show that the effciency of a battery when delivering maximum power is only 50% (b) What is power output of the source abvoe if the battery is hosrted? what is the power dissipation inside the battery in that case?

Current & current density |Drift Velocity|Resistance, Resistivity and conductivity |Previous year questions |OHM's Law and its different forms |All about battery |All about power|Questions |Kirchhoff's Law|Questions |Electrical Instruments |Questions

Current & current density |Drift Velocity|Resistance, Resistivity and conductivity |Previous year questions |OHM's Law and its different forms |All about battery |All about power|Questions |Kirchhoff's Law|Questions |Electrical Instruments |Questions

A given resistor cannot carry currents exceeding 20 A , without exceeding its maximum power dissipaation ratings . By forced air cooling suppose that we increase the rate at which heat can be carried by a factor of 2 . Now the maximum current that the resistor can carry is

Three resistors having resistances of 1.60 Omega, 2.40 Omega and 4.80 Omega are connected in parallel to a 28.0 V battery that has negligible internal resistance. Find (a) the equivalent resistance of the combination. (b) the current in each resistor. (c) the total current through the battery. (d) the voltage across each resistor. (e) the power dissipated in each resistor. (f) which resistor dissipates the maximum power the one with the greatest resistance or the least resistance? Explain why this should be.