Magnetic Effects of Current & Magnetism · JEE Main previous year questions

2015 2 questions

1. Q482015 · 4 Apr 2015 · Shift 1
   
   1. A.$(B)$ and $(D)$, respectively
   2. B.$(B)$ and $(C)$, respectively
   3. C.$(A)$ and $(B)$, respectively
   4. D.$(A)$ and $(C)$, respectively
   Show answer

   Answer: A

2. Q492015 · 4 Apr 2015 · Shift 1

   Two coaxial solenoids of different radius carry current $I$ in the same direction. ${\vec{F}}_1$ be the magnetic force on the inner solenoid due to the outer one and ${\vec{F}}_2$ be the magnetic force on the outer solenoid due to the inner one. Then :

   1. A.${\vec{F}}_1\text{ is radially in wards and }{\vec{F}}_2=0$
   2. B.${\vec{F}}_1\text{ is radially outwards and }{\vec{F}}_2=0$
   3. C.${\vec{F}}_1={\vec{F}}_2=0$
   4. D.${\vec{F}}_1\text{ is radially inwards and }{\vec{F}}_2\text{ is radially outards}$
   Show answer

   Answer: C