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1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
In the given circuit diagram, a wire is joining points B and D. The current in this wire is : JEE Main 2020 (Online) 9th January Morning Slot Physics - Current Electricity Question 144 English
A
4 A
B
2 A
C
zero
D
0.4 A
2
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
A galvanometer having a coil resistance 100 $$\Omega $$ gives a full scale deflection when a current of 1 mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 10 V?
A
8.9 k$$\Omega $$
B
10 k$$\Omega $$
C
9.9 k$$\Omega $$
D
7.9 k$$\Omega $$
3
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
The length of a potentiometer wire is 1200 cm and it carries a current of 60 mA. For a cell of emf 5V and internal resistance of 20$$\Omega $$, the null point on it is found to be a 1000 cm. The resistance of whole wire is :
A
80$$\Omega $$
B
60$$\Omega $$
C
120$$\Omega $$
D
100$$\Omega $$
4
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
In the figure, potential difference between A and B is : JEE Main 2020 (Online) 7th January Evening Slot Physics - Current Electricity Question 151 English
A
10 V
B
5 V
C
zero
D
15 V
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