1
JEE Main 2021 (Online) 26th February Evening Shift
+4
-1
A wire of 1$$\Omega$$ has a length of 1 m. It is stretched till its length increases by 25%. The percentage change in resistance to the nearest integer is :
A
76%
B
12.5%
C
25%
D
56%
2
JEE Main 2021 (Online) 26th February Morning Shift
+4
-1
Five equal resistances are connected in a network as shown in figure. The net resistance between the points A and B is :

A
$${{3R} \over 2}$$
B
$${{R} \over 2}$$
C
2R
D
R
3
JEE Main 2021 (Online) 24th February Morning Slot
+4
-1
A current through a wire depends on time as

i = $$\alpha$$0t + $$\beta$$t2

where $$\alpha$$0 = 20 A/s and $$\beta$$ = 8 As$$-$$2. Find the charge crossed through a section of the wire in 15 s.
A
2250 C
B
2100 C
C
260 C
D
11250 C
4
JEE Main 2021 (Online) 24th February Morning Slot
+4
-1
A cell E1 of emf 6V and internal resistance 2$$\Omega$$ is connected with another cell E2 of emf 4V and internal resistance 8$$\Omega$$ (as shown in the figure). The potential difference across points X and Y is :

A
10.0 V
B
2.0 V
C
5.6 V
D
3.6 V
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