Question 250 of 380
An electrical power line, having a total resistance of delivers at . The efficiency of the transmission line is approximately :
Show answer and solution
Answer: (D)
Current Electricity
JEE Main level, single correct, medium
JEE Main question paper PDF
Open a shift to read the full paper on this page, or download it.
Opening paper…
More Physics practice
- Current ElectricityIn the given electrical circuit network between terminals and , resistors are , , , and . Determine the equivalent resistance .
- Current ElectricityIn the given meter bridge setup, null point is found at distance from end . If the known standard resistor is , the value of the unknown resistance in the left gap is:
- Current ElectricityA wire of resistance is stretched to double its original length keeping volume constant. Its new resistance is:
- Current ElectricityIn an experiment to determine the resistance of a given wire using Ohm's law, the voltmeter and ammeter readings are noted as and , respectively. The least counts of voltmeter and ammeter are and , respectively. The estimated error in the resistance measurement is _______ .
- Current ElectricityWhich one of the following is not a measurable quantity?
- Current ElectricityA cylindrical conductor of length 2 m and area of cross-section carries an electric current of 1.6 A when its ends are connected to a 2 V battery. Mobility of electrons in the conductor is . The value of is :
(electron concentration and electron charge
JEE Main Physics practice question on Current Electricity (Electric Power and Heating Effect of Current), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.