1
JEE Main 2019 (Online) 11th January Evening Slot
+4
-1
An electric field of 1000 V/m is applied to an electric dipole at angle of 45o. The value of electric dipole moment is 10–29 C.m. What is the potential energy of the electric dipole?
A
- 7 $$\times$$ 10–27 J
B
$$-$$ 9 $$\times$$ 10–20 J
C
$$-$$ 10 $$\times$$ 10–29 J
D
$$-$$ 20 $$\times$$ 10–18 J
2
JEE Main 2019 (Online) 11th January Evening Slot
+4
-1
A galvanometer having a resistance of 20 $$\Omega$$ and 30 divisions on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter upto 15 volt, is:
A
120 $$\Omega$$
B
125 $$\Omega$$
C
80 $$\Omega$$
D
100 $$\Omega$$
3
JEE Main 2019 (Online) 11th January Evening Slot
+4
-1
A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of each side of the frame is increased by a factor of 3, keeping the number of turns of the coil per unit length of the frame the same, then the self inductance of the coil:
A
decreases by a factor of $$9\sqrt 3$$
B
increases by a factor of 27
C
decreases by a factor of 9
D
increases by a factor of 3
4
JEE Main 2019 (Online) 11th January Evening Slot
+4
-1
In the circuit shown, the potential difference between A and B is :

A
6 V
B
3 V
C
2 V
D
1 V
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