emf and potential difference

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Potential difference of a battery is 2.2 V when it is connected across a resistance of 5 Ω, if suddenly potential difference falls to 1.8 V, its internal resistance will be

Potential difference of a battery is 2.2 V when it is connected across a resistance of 5 Ω, if suddenly potential difference falls to 1.8 V, its internal resistance will be
  • A. 1 Ω
  • B. 1.1 Ω
  • C. 2 Ω
  • D. 2.1 Ω
  • Correct Answer: Option B

Formula E²/4R is formula representing

Formula E²/4R is formula representing
  • A. power
  • B. output power
  • C. max output power
  • D. resistance
  • Correct Answer: Option C

Electromotive force of a battery can be defined with formula of

Electromotive force of a battery can be defined with formula of
  • A. E = IR
  • B. E = IR + I
  • C. E = IR + r
  • D. E = IR + Ir
  • Correct Answer: Option D

EMF is an abbreviation of

EMF is an abbreviation of
  • A. electromotive force
  • B. electrical motive force
  • C. electronic motive force
  • D. both a and b
  • Correct Answer: Option A