πŸ“Š Current Electricity
Q. Conductance : mho ::
  • (A) resistance : ohm
  • (B) capacitance : henry
  • (C) inductance : farad
  • (D) lumen : steradian
πŸ’¬ Discuss
βœ… Correct Answer: (A) resistance : ohm
πŸ“Š Current Electricity
Q. Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
  • (A) 1/9 times
  • (B) 3 times
  • (C) 9 times
  • (D) unchanged
πŸ’¬ Discuss
βœ… Correct Answer: (C) 9 times
πŸ“Š Current Electricity
Q. Current velocity through a copper conductor is
  • (A) the same as propagation velocity of electric energy
  • (B) independent of current strength
  • (C) of the order of a few Λ†.s/m
  • (D) nearly 3 x 108 m/s
πŸ’¬ Discuss
βœ… Correct Answer: (C) of the order of a few Λ†.s/m
πŸ“Š Current Electricity
Q. Electric current passing through the circuit produces
  • (A) magnetic effect
  • (B) luminous effect
  • (C) thermal effect
  • (D) chemical effect
πŸ’¬ Discuss
βœ… Correct Answer: (C) thermal effect
πŸ“Š Current Electricity
Q. For which of the following β€˜ampere second' could be the unit?
  • (A) Reluctance
  • (B) Charge
  • (C) Power
  • (D) Energy
πŸ’¬ Discuss
βœ… Correct Answer: (B) Charge
πŸ“Š Current Electricity
Q. Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 0.25 Q. If the same four wires are connected is series the effective resistance will be
  • (A) 1 Q
  • (B) 2 Q
  • (C) 3 Q
  • (D) 4 Q
πŸ’¬ Discuss
βœ… Correct Answer: (D) 4 Q
πŸ“Š Current Electricity
Q. Heat in a conductor is produced on the passage of electric current due to
  • (A) reactance
  • (B) capacitance
  • (C) impedance
  • (D) resistance
πŸ’¬ Discuss
βœ… Correct Answer: (D) resistance

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