1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider four conducting materials copper, tungsten, mercury and aluminium with resistivity $$\rho $$C, $$\rho $$T, $$\rho $$M and $$\rho $$A respectively. Then :
A
$$\rho $$C > $$\rho $$A > $$\rho $$T
B
$$\rho $$M > $$\rho $$A > $$\rho $$C
C
$$\rho $$A > $$\rho $$T > $$\rho $$C
D
$$\rho $$A > $$\rho $$M > $$\rho $$C
2
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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 205 English
A
4 A
B
2 A
C
zero
D
0.4 A
3
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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$$\Omega $$
4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
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$$\Omega $$
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