1
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1 For the given figures, choose the correct options : A
The rms current in circuit (b) can be larger than that in (a)
B
The rms current in figure (a) is always equal to that in figure (b)
C
The rms current in circuit (b) can never be larger than that in (a)
D
At resonance, current in (b) is less than that in (a)
2
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1 An object moves at a constant speed along a circular path in a horizontal plane with center at the origin. When the object is at $$x=+2~\mathrm{m}$$, its velocity is $$\mathrm{ - 4\widehat j}$$ m/s. The object's velocity (v) and acceleration (a) at $$x=-2~\mathrm{m}$$ will be

A
$$v=4\mathrm{\widehat i~m/s},a=8\mathrm{\widehat j~m/s^2}$$
B
$$v=4\mathrm{\widehat j~m/s},a=8\mathrm{\widehat i~m/s^2}$$
C
$$v=-4\mathrm{\widehat i~m/s},a=-8\mathrm{\widehat j~m/s^2}$$
D
$$v=-4\mathrm{\widehat j~m/s},a=8\mathrm{\widehat i~m/s^2}$$
3
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1 The time period of a satellite of earth is 24 hours. If the separation between the earth and the satellite is decreased to one fourth of the previous value, then its new time period will become.

A
12 hours
B
3 hours
C
6 hours
D
4 hours
4
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1 The electric current in a circular coil of four turns produces a magnetic induction 32 T at its centre. The coil is unwound and is rewound into a circular coil of single turn, the magnetic induction at the centre of the coil by the same current will be :

A
2 T
B
4 T
C
8 T
D
16 T
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