JEE Main 2017 (Online) 9th April Morning Slot | Magnetics Question 219 | Physics

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

A negative test charge is moving near a long straight wire carrying a current. The force acting on the test charge is parallel to the direction of the current. The motion of the charge is :

away from the wire

towards the wire

parallel to the wire along the current

parallel to the wire opposite to the current

JEE Main 2017 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

-1

A uniform magnetic field B of 0.3 T is along the positive Z-direction. A rectangular loop (abcd) of sides 10 cm × 5 cm carries a current I of 12 A. Out of the followingdifferent orientations which one corresponds to stable equilibrium ?

JEE Main 2017 (Online) 9th April Morning Slot Physics - Magnetics Question 218 English Option 1

JEE Main 2017 (Online) 9th April Morning Slot Physics - Magnetics Question 218 English Option 2

JEE Main 2017 (Online) 9th April Morning Slot Physics - Magnetics Question 218 English Option 3

JEE Main 2017 (Online) 9th April Morning Slot Physics - Magnetics Question 218 English Option 4

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

In a certain region static electric and magnetic fields exist. The magnetic field is given by $$\overrightarrow B = {B_0}\left( {\widehat i + 2\widehat j - 4\widehat k} \right)$$ . If a test charge moving with a velocity $$\overrightarrow \upsilon = {\upsilon _0}\left( {3\widehat i - \widehat j + 2\widehat k} \right)$$ experiences no force in that region, then the electric field in the region, in SI units, is :

$$\overrightarrow E = - {\upsilon _0}\,{B_0}\left( {3\widehat i - 2\widehat j - 4\widehat k} \right)$$

$$\overrightarrow E = - {\upsilon _0}\,{B_0}\left( {\widehat i + \widehat j + 7\widehat k} \right)$$

$$\overrightarrow E = {\upsilon _0}\,{B_0}\left( {14\widehat j + 7\widehat k} \right)$$

$$\overrightarrow E = - {\upsilon _0}\,{B_0}\left( {14\widehat j + 7\widehat k} \right)$$

JEE Main 2017 (Online) 8th April Morning Slot

MCQ (Single Correct Answer)

-1

A magnetic dipole in a constant magnetic field has :

maximum potential energy when the torque is maximum.

zero potential energy when the torque is minimum.

zero potential energy when the torque is maximum.

minimum potential energy when the torque is maximum.