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Current Electricity

JEE Main 2025 (Online) 22nd January Morning ShiftMCQMedium📈 Topic in 13% papers+4−1
Ques. 1JEE Main 2025, 22 January (Morning Shift)

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below.

  1. Statement-I is false but Statement-II is true
  2. Statement-I is true but Statement-II is false
  3. Both Statement-I and Statement-II are false
  4. Both Statement-I and Statement-II are true

Answer

(1) Statement-I is false but Statement-II is true

Solution

Cells in parallel: 1req= 1r1+ 1r2 and Eeq= E1r2+E2r1r1+r2.

[figure]

Eeq is a weighted mean, so it lies between E1 and E2, not below both Statement-I false

1req> 1r1, 1r2 req<r1, r2 Statement-II true

Answer: (1)

Keep practising — Current Electricity

Ques. 2JEE Main 2025, 22 January (Morning Shift)

Which of the following resistivity ( ) v/s temperature ( T ) curves is most suitable to be used in wire bound standard resistors?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 3JEE Main 2025, 22 January (Morning Shift)

Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance Rp=1 as shown in the figure. An external resistance of Re=2 is connected via the sliding contact. The electric current in the circuit is : [figure]

  1. 1.35 A
  2. 0.9 A
  3. 1.0 A
  4. 0.3 A
Ques. 4JEE Main 2025, 22 January (Evening Shift)

The net current flowing in the given circuit is A. [figure]

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