1
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A fighter plane of length 20 m, wing span (distance from tip of one wing to the tip of the other wing) of 15 m and height 5 m is flying towards east over Delhi. Its speed is 240 ms−1. The earth’s magnetic field over Delhi is 5 $$ \times $$10−5 T with the declination angle ~ 08 and dip of $$\theta $$ such that sin $$\theta $$ = 2 3 . If the voltage developed is VB between the lower and upper side of the plane and VW between the tips of the wings then VB and VW are close to :
A
VB = 45 mV; VW = 120 mV with right side of pilot at higher voltage
B
VB = 45 mV; VW = 120 mV with left side of pilot at higher voltage
C
VB = 40 mV; VW = 135 mV with right side of pilot at high voltage
D
VB = 40 mV; VW = 135 mV with left side of pilot at higher voltage
2
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider a thin metallic sheet perpendicular to the plane of the paper moving with speed ‘v’ in a uniform magnetic field B going into the plane of the paper (See figure). If charge densities $$\sigma $$1 and $$\sigma $$2 are induced on the left and right surfaces, respectively, of the sheet then (ignore fringe effects) :

JEE Main 2016 (Online) 10th April Morning Slot Physics - Magnetics Question 213 English
A
$$\sigma $$1 = $$ \in $$0 $$\upsilon $$ B, $$\sigma $$2 = $$-$$ $$ \in $$0 $$\upsilon $$ B
B
$$\sigma $$1 = $${{{ \in _0}\upsilon \,B} \over 2},$$ $$\sigma $$2 = $${{ - { \in _0}\,\upsilon B} \over 2}$$
C
$$\sigma $$1 = $$\sigma $$2 = $${ \in _0}\,\upsilon B$$
D
$$\sigma $$1 = $${{ - { \in _0}\upsilon B} \over 2},$$ $$\sigma $$2 = $${{ { \in _0}\upsilon B} \over 2},$$
3
JEE Main 2016 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A galvanometer has a 50 division scale. Battery has no internal resistance. It is found that there is deflection of 40 divisions when R = 2400 $$\Omega $$. Deflection becomes 20 divisions when resistance taken from resistance box is 4900 $$\Omega $$. Then we can conclude :

JEE Main 2016 (Online) 10th April Morning Slot Physics - Magnetics Question 212 English
A
Resistance of galvanometer is 200 $$\Omega $$
B
Full scale deflection current is 2 mA.
C
Current sensitivity of galvanometer is 20 $$\mu $$A/division.
D
Resistance required on R.B. for a deflection of 10 divisions is 9800 $$\Omega $$.
4
JEE Main 2016 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of 75o. One of the fields has a magnitude of 15 mT. The dipole attains stable equilibrium at an angle of 30o with this field. The magnitude of the other field (in mT ) is close to
A
11
B
36
C
1
D
1060
JEE Main Subjects
EXAM MAP
Joint Entrance Examination
JEE MainJEE AdvancedWB JEE
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Medical
NEET