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 having 12V emf and internal resistance 3Omega is connected to a resistor. If the current in the circuit is 1A, then the resistance of resistor and lost voltage of the battery when circuit is closed will be

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