Laws of Motion & Friction · JEE Main previous year questions

2017 2 questions

1. Q382017 · 9 Apr 2017 · Shift 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 :

   1. A.away from the wire
   2. B.towards the wire
   3. C.parallel to the wire along the current
   4. D.parallel to the wire opposite to the current
   Show answer

   Answer: B

2. Q332017 · 8 Apr 2017 · Shift 1

   A 1 kg block attached to a spring vibrates with a frequency of 1 Hz on a frictionless horizontal table. Two springs identical to the original spring are attached in parallel to an 8 kg block placed on the same table. So, the frequency of vibration of the 8 kg block is :

   1. A.$\frac{1}{4}\mathrm{Hz}$
   2. B.$\frac{1}{2\sqrt{2}}\mathrm{Hz}$
   3. C.$\frac{1}{2}\mathrm{Hz}$
   4. D.$2\mathrm{Hz}$
   Show answer

   Answer: C