Magnetic Effects of Electric Current

12 solved questions from Class 10 Science, each with the full working. Tap any question to see the step-by-step solution.

• 1 A thin wire is bent into a semicircle of radius 5 cm lying in the plane of the page. A current of 2 A flows through the wire in a clockwise direction as shown. What is the direction of the magnetic field at the centre of the semicircle? hard MCQ 3 marks Magnetic field of a curved current‑carrying conductor
• 2 A long straight wire carries a current of 5 A. Find the magnetic field at a point 2 cm from the wire. Take μ_0=4π×10^-7 T·m/A. easy 1 mark Magnetic field of a straight conductor
• 3 A solenoid has 400 turns and a length of 0.40 m. It carries a current of 2 A. What is the magnetic field inside the solenoid? (Take μ_0=4π×10^-7 T·m/A.) medium MCQ 2 marks Magnetic field inside a solenoid
• 4 Which of the following statements is incorrect regarding magnetic field lines? easy MCQ 1 mark Properties of magnetic field lines
• 5 An electric oven rated at 2.2 kW and 220 V is operated in a domestic circuit that has a current rating of 5 A. What result is expected when the oven is switched on? Explain with necessary calculations. medium 3 marks Electric circuit overloading and current rating
• 6 An alpha particle (a positively charged particle) projected towards the West is deflected towards the North by a magnetic field. What is the direction of the magnetic field? medium 3 marks Fleming's left-hand rule
• 7 What is the primary topic or theoretical principle explored in 'Magnetic Effects of Electric Current' (Class 10 SCIENCE)? medium MCQ Chapter Core Principle
• 8 Which key mechanism or analytical rule is highlighted in 'Magnetic Effects of Electric Current'? medium MCQ Key Analytical Mechanism
• 9 An electric oven rated at 3 kW and 220 V is connected to a domestic circuit with a current rating of 10 A. What will happen when the oven is switched on? hard 3 marks Power, voltage, current, and circuit protection
• 10 A straight copper wire of length 3.0 cm carries a current of 5 A and is placed in a uniform magnetic field of strength 0.40 T. The wire is perpendicular to the field. Find the magnitude of the magnetic force acting on the wire. easy 1 mark Magnetic force on a current‑carrying conductor
• 11 A circular loop of wire lies in the plane of the page and carries a current in the clockwise direction. What is the direction of the magnetic field at the centre of the loop? medium MCQ 2 marks Direction of magnetic field due to loop
• 12 A straight copper wire of length 4.0 cm carries a current of 6 A and is placed in a uniform magnetic field of strength 0.30 T. The wire is perpendicular to the field. Find the magnitude of the magnetic force acting on the wire. easy 1 mark Magnetic force on straight conductor