JEE Main 2020 (Online) 5th September Morning Slot | Current Electricity Question 201 | Physics

An electrical power line, having a total resistance of 2 $$\Omega $$, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately :

85%

96%

72%

91%

JEE Main 2020 (Online) 5th September Morning Slot

MCQ (Single Correct Answer)

-1

A galvanometer of resistance G is converted into a voltmeter of range 0 – 1 V by connecting a resistance R₁ in series with it. The additional resistance that should be connected in series with R₁ to increase the range of the voltmeter to 0 – 2 V will be :

R₁

R₁ + G

R₁ - G

JEE Main 2020 (Online) 4th September Evening Slot

MCQ (Single Correct Answer)

-1

The value of current i₁ flowing from A to C in the circuit diagram is : JEE Main 2020 (Online) 4th September Evening Slot Physics - Current Electricity Question 204 English

JEE Main 2020 (Online) 4th September Evening Slot Physics - Current Electricity Question 204 English

1 A

4 A

5 A

2 A

JEE Main 2020 (Online) 4th September Morning Slot

MCQ (Single Correct Answer)

-1

A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is :

0.50 W

0.072 W

0.10 W

0.125 W

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