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Current Electricity

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Q. What is the potential difference across a 10Ω resistor if a current of 2A flows through it?
  • A. 5V
  • B. 10V
  • C. 20V
  • D. 15V
Q. What is the potential difference across a 10Ω resistor if a current of 4A flows through it?
  • A. 20V
  • B. 40V
  • C. 10V
  • D. 30V
Q. What is the potential difference across the galvanometer in a balanced Wheatstone bridge?
  • A. Zero
  • B. Equal to the supply voltage
  • C. Depends on the resistances
  • D. Half of the supply voltage
Q. What is the power consumed by a 10 ohm resistor when a current of 2 A flows through it?
  • A. 20 W
  • B. 40 W
  • C. 10 W
  • D. 5 W
Q. What is the power consumed by a 10 ohm resistor when a current of 3 A flows through it?
  • A. 30 W
  • B. 90 W
  • C. 60 W
  • D. 15 W
Q. What is the power consumed by a 10Ω resistor when a current of 2A flows through it?
  • A. 20W
  • B. 40W
  • C. 10W
  • D. 5W
Q. What is the power consumed by a 12 V battery supplying a current of 2 A?
  • A. 24 W
  • B. 12 W
  • C. 6 W
  • D. 48 W
Q. What is the power consumed by a 5 ohm resistor carrying a current of 3 A?
  • A. 15 W
  • B. 9 W
  • C. 5 W
  • D. 3 W
Q. What is the power consumed by a 5 ohm resistor when a current of 2A flows through it?
  • A. 10W
  • B. 20W
  • C. 5W
  • D. 15W
Q. What is the power consumed by a 5 ohm resistor when a current of 3 A flows through it?
  • A. 15 W
  • B. 9 W
  • C. 5 W
  • D. 3 W
Q. What is the power dissipated in a 10Ω resistor carrying a current of 2A?
  • A. 20W
  • B. 30W
  • C. 40W
  • D. 50W
Q. What is the power dissipated in a 4 ohm resistor carrying a current of 3 A?
  • A. 12 W
  • B. 9 W
  • C. 6 W
  • D. 3 W
Q. What is the power dissipated in a resistor of 10 ohms carrying a current of 2 A?
  • A. 20 W
  • B. 10 W
  • C. 5 W
  • D. 40 W
Q. What is the power dissipated in a resistor of 5Ω carrying a current of 2A?
  • A. 5W
  • B. 10W
  • C. 20W
  • D. 40W
Q. What is the power dissipated in a resistor of 5Ω carrying a current of 3A?
  • A. 15W
  • B. 9W
  • C. 5W
  • D. 3W
Q. What is the power dissipated in a resistor of 8Ω when a current of 2A flows through it?
  • A. 4W
  • B. 8W
  • C. 16W
  • D. 32W
Q. What is the primary use of a Wheatstone bridge in practical applications?
  • A. To measure voltage
  • B. To measure current
  • C. To measure resistance
  • D. To measure power
Q. What is the principle behind a potentiometer?
  • A. It measures current in a circuit
  • B. It measures voltage by balancing it against a known voltage
  • C. It measures resistance directly
  • D. It measures power in a circuit
Q. What is the principle of a potentiometer?
  • A. It measures current in a circuit.
  • B. It measures voltage by balancing it against a known voltage.
  • C. It measures resistance directly.
  • D. It measures power in a circuit.
Q. What is the purpose of a galvanometer in a Wheatstone bridge?
  • A. To measure voltage
  • B. To measure current
  • C. To detect the balance condition
  • D. To provide power
Q. What is the purpose of the galvanometer in a Wheatstone bridge?
  • A. To measure voltage
  • B. To measure current
  • C. To detect the balance condition
  • D. To provide power
Q. What is the relationship between voltage, current, and resistance according to Ohm's Law?
  • A. V = I * R
  • B. V = I / R
  • C. V = R / I
  • D. V = I + R
Q. What is the relationship between voltage, current, and resistance in a circuit according to Ohm's Law?
  • A. V = I + R
  • B. V = I - R
  • C. V = I * R
  • D. V = I / R
Q. What is the resistivity of a material if a 5 m long wire with a cross-sectional area of 1 mm² has a resistance of 10 Ω?
  • A. 2 x 10^-6 Ω·m
  • B. 5 x 10^-6 Ω·m
  • C. 1 x 10^-5 Ω·m
  • D. 2 x 10^-5 Ω·m
Q. What is the resistivity of a material if a wire of length 2 m and cross-sectional area 1 mm² has a resistance of 4 ohms?
  • A. 2 x 10^-6 Ω·m
  • B. 4 x 10^-6 Ω·m
  • C. 8 x 10^-6 Ω·m
  • D. 1 x 10^-6 Ω·m
Q. What is the role of a fuse in an electrical circuit?
  • A. To increase current
  • B. To decrease voltage
  • C. To protect against overload
  • D. To store energy
Q. What is the role of the galvanometer in a potentiometer circuit?
  • A. To measure current
  • B. To measure resistance
  • C. To indicate the balance point
  • D. To provide a reference voltage
Q. What is the role of the galvanometer in a Wheatstone bridge?
  • A. To measure voltage
  • B. To measure current
  • C. To detect balance
  • D. To provide power
Q. What is the role of the jockey in a potentiometer setup?
  • A. To connect the circuit
  • B. To measure current
  • C. To find the balance point
  • D. To provide a fixed voltage
Q. What is the role of the jockey in a potentiometer?
  • A. To measure current
  • B. To connect the circuit
  • C. To find the null point
  • D. To provide a reference voltage
Showing 511 to 540 of 607 (21 Pages)

Current Electricity MCQ & Objective Questions

Current Electricity is a crucial topic in physics that students must master for their exams. Understanding this concept not only helps in grasping fundamental principles but also significantly boosts your performance in objective questions. Practicing MCQs and important questions related to Current Electricity can enhance your exam preparation and increase your chances of scoring higher marks.

What You Will Practise Here

  • Ohm's Law and its applications
  • Series and parallel circuits
  • Electrical power and energy calculations
  • Resistance, resistivity, and factors affecting resistance
  • Kirchhoff's laws and their practical applications
  • Concept of current, voltage, and their relationship
  • Diagrams and circuit analysis techniques

Exam Relevance

The topic of Current Electricity is frequently tested in various examinations, including CBSE, State Boards, NEET, and JEE. Students can expect questions that assess their understanding of fundamental concepts, application of formulas, and problem-solving skills. Common question patterns include numerical problems, theoretical questions, and circuit analysis, making it essential to be well-prepared with Current Electricity MCQ questions.

Common Mistakes Students Make

  • Confusing current with voltage and their units
  • Misapplying Ohm's Law in complex circuits
  • Overlooking the effects of temperature on resistance
  • Failing to differentiate between series and parallel connections
  • Neglecting to draw circuit diagrams for better understanding

FAQs

Question: What is the formula for calculating electrical power?
Answer: The formula for electrical power is P = VI, where P is power, V is voltage, and I is current.

Question: How does resistance change in series and parallel circuits?
Answer: In series circuits, total resistance increases, while in parallel circuits, total resistance decreases.

Now is the time to enhance your understanding of Current Electricity! Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your exams. Start solving today and boost your confidence!

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