current electricity

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When charge of 90 C passes through wire in 1 hour 15 min, its current will be

When charge of 90 C passes through wire in 1 hour 15 min, its current will be
  • A. 10 mA
  • B. 20 mA
  • C. 30 mA
  • D. 40 mA
  • Correct Answer: Option B

When current passing is 300 mA, electrons passing through bulb in 1 minute are

When current passing is 300 mA, electrons passing through bulb in 1 minute are
  • A. None
  • B. None
  • C. None
  • D. None
  • Correct Answer: Option D

Bar of iron 2 cm × 2 cm having area 4 cm² and resistivity of 11 × 10-8Ω meter will have resistance of

Bar of iron 2 cm × 2 cm having area 4 cm² and resistivity of 11 × 10-8Ω meter will have resistance of
  • A. None
  • B. None
  • C. None
  • D. None
  • Correct Answer: Option D

Potential difference of any device can be measured with instrument known as

Potential difference of any device can be measured with instrument known as
  • A. voltmeter
  • B. potentiometer
  • C. CRO
  • D. galvanometer
  • Correct Answer: Option A