1
JEE Main 2024 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In a metre-bridge when a resistance in the left gap is $2 \Omega$ and unknown resistance in the right gap, the balance length is found to be $40 \mathrm{~cm}$. On shunting the unknown resistance with $2 \Omega$, the balance length changes by :
A
$62.5 $
B
$22.5 \mathrm{~cm}$
C
$20 \mathrm{~cm}$
D
$65 \mathrm{~cm}$
2
JEE Main 2024 (Online) 1st February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In an ammeter, $5 \%$ of the main current passes through the galvanometer. If resistance of the galvanometer is $\mathrm{G}$, the resistance of ammeter will be :
A
$199 \mathrm{~G}$
B
$200 \mathrm{~G}$
C
$\frac{G}{20}$
D
$\frac{\mathrm{G}}{199}$
3
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The reading in the ideal voltmeter $(\mathrm{V})$ shown in the given circuit diagram is :

JEE Main 2024 (Online) 1st February Morning Shift Physics - Current Electricity Question 23 English
A
$3 \mathrm{~V}$
B
$10 \mathrm{~V}$
C
$5 \mathrm{~V}$
D
$0 \mathrm{~V}$
4
JEE Main 2024 (Online) 1st February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
A galvanometer has a resistance of $50 ~\Omega$ and it allows maximum current of $5 \mathrm{~mA}$. It can be converted into voltmeter to measure upto $100 \mathrm{~V}$ by connecting in series a resistor of resistance :
A
$19500 \Omega$
B
$5975 \Omega$
C
$20050 \Omega$
D
$19950 \Omega$
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