Current Electricity · JEE Main previous year questions

2016 3 questions

1. Q452016 · 3 Apr 2016 · Shift 1

   The temperature dependence of resistance of $Cu$ and undoped $Si$ in the temperature range $300-400\mathrm{K}$, is best described by :

   1. A.Linear increases for $Cu$, exponential decrease of $Si$.
   2. B.Linear decrease for $Cu$, linear decrease for $Si$
   3. C.Linear increase for $Cu$, linear increase for $Si$.
   4. D.Linear increase for $Cu$, exponential increase for $Si$
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   Answer: A

2. Q472016 · 3 Apr 2016 · Shift 1

   A galvanometer having a coil resistance of $100\Omega$ gives a full scale deflection, when a currect of $1\mathrm{mA}$ is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of $10\mathrm{A}$, is :

   1. A.$0.1\Omega$
   2. B.$3\Omega$
   3. C.$0.01\Omega$
   4. D.$2\Omega$
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   Answer: C

3. Q532016 · 3 Apr 2016 · Shift 1
   
   1. A.Simple diode, Zener diode, Solar cell, Light dependent resistance
   2. B.Zener diode, Simple diode, Light dependent resistance, Solar cell
   3. C.Solar cell, Light dependent resistance, Zener diode, simple diode
   4. D.Zener diode, Solar cell, simple diode, Light dependent resistance
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   Answer: A