Free Current Electricity MCQs with Answers
1,052 Current Electricity MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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1,052 questions · page 17 of 53
- A. Filament of a bulb
- B. Semiconductor diode
- C. Both (a) and (b)
- D. None of above
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Correct answer: Both (a) and (b)- A. Different
- B. Same
- C. Variable
- D. None of these
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Correct answer: Different- A. Many paths
- B. Two paths
- C. Three paths
- D. None of these
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Correct answer: Many paths- A. Rc = R1 + R2 + R3
- B. Rc = 1/R1 + I/R2 + 1/R3
- C. 1/Re = 1/R1 + 1/R2 + 1/R3
- D. All of above
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Correct answer: Rc = R1 + R2 + R3- A. Re = R1 + R2 + R3
- B. Re = 1/R1 + 1/R2 + 1/R3
- C. 1/Re = 1/R1 + 1/R2 + 1/R3
- D. All of above
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Correct answer: 1/Re = 1/R1 + 1/R2 + 1/R3- A. Temperature coefficient of resistance
- B. Temperature coefficient of resistivity
- C. Temperature coefficient of conductivity
- D. None of these
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Correct answer: Temperature coefficient of resistivity- A. K
- B. K-¹
- C. Ohm K
- D. Ohm
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Correct answer: K-¹- A. T = 125 K
- B. T = 50 K
- C. T = 130 K
- D. T = 75 K
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Correct answer: T = 125 K- A. 11.0 ohms
- B. 1.0 ohm
- C. 5.0 ohms
- D. 70 ohms
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Correct answer: 1.0 ohm- A. Copper
- B. Gold
- C. Silver
- D. Aluminum
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Correct answer: Silver- A. Gold
- B. Silver
- C. Copper
- D. Silicon
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Correct answer: Silicon- A. +ve
- B. -ve
- C. Neutral
- D. None of above
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Correct answer: -ve- A. ±20%
- B. ±15%
- C. ±5%
- D. ±10%
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Correct answer: ±10%- A. 20%
- B. 15%
- C. ±5%
- D. 10%
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Correct answer: ±5%- A. Decrease with rise of temperature
- B. Increase with rise of temperature
- C. Remains same at every temperature
- D. None of above
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Correct answer: Increase with rise of temperature- A. Thermistor
- B. Variable resistor
- C. Fixed resistor
- D. None of these
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Correct answer: Thermistor- A. Rheostat
- B. Solenoid
- C. Inductor
- D. None of above
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Correct answer: Rheostat- A. Potential divider
- B. Current divider
- C. Wheat stone bridge
- D. Power divider
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Correct answer: Potential divider- A. P=I²R
- B. P= I x V
- C. P = V²/R
- D. All of above
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Correct answer: All of above- A. Variable resistor
- B. Power supply
- C. Potential divider
- D. None of above
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Correct answer: Variable resistor