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JEE Main 2021 (27 Jul, Shift 2) · Ohm's Law, Resistivity & Temperature

Ohm's Law, Resistivity & Temperature question from JEE Main 2021 (27 Jul, Shift 2)

Q34JEE Main 2021 · 27 JUL · SHIFT 2Medium

Ohm's Law, Resistivity & Temperature

For the circuit shown, the value of current at time t = 3.2 s will be _________ A.

Figure

[Voltage distribution V(t) is shown by Fig. (1) and the circuit is shown in Fig. (2)]

Numerical answer type. Work it out, then open the answer.

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Answer: 1

  1. From Fig. 1, between t=3t = 3 s and 44 s, VV rises from 5 V to 10 V at 5 V/s.
  2. At t=3.2t = 3.2 s: V=5+5×0.2=6V = 5 + 5\times0.2 = 6 V.
  3. The 5 V battery opposes V(t)V(t) in the loop, so net emf =6−5=1= 6 - 5 = 1 V.
  4. I=1/1=1I = 1/1 = 1 A.
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