JEE Main 2020 (Online) 5th September Evening Slot | Current Electricity Question 220 | Physics

In the circuit, given in the figure currents in different branches and value of one resistor are shown. Then potential at point B with respect to the point A is : JEE Main 2020 (Online) 5th September Evening Slot Physics - Current Electricity Question 221 English

JEE Main 2020 (Online) 5th September Evening Slot Physics - Current Electricity Question 221 English

+2 V

-2 V

+1 V

-1 V

JEE Main 2020 (Online) 5th September Evening Slot

MCQ (Single Correct Answer)

-1

A galvanometer is used in laboratory for detecting the null point in electrical experiments. If, on passing a current of 6 mA it produces a deflection of 2^o, its figure of merit is close to :

6 $$ \times $$ 10^–3 A/div

666^o A/div

3 $$ \times $$ 10^–3 A/div

333^o A/div

JEE Main 2020 (Online) 5th September Morning Slot

MCQ (Single Correct Answer)

-1

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

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