10th Physics Chapter 6: Electromagnetism
| Sr # | Questions | A | B | C | D |
|---|---|---|---|---|---|
| 1 | When a current-carrying conductor is placed in a magnetic field, what force acts on it? | Gravitational force | Electrostatic force | Magnetic force | Nuclear force | 2 | In an AC generator, the direction of the induced current changes: | Periodically | Continuously | Irregularly | Never changes | 3 | In a transformer, the primary coil is connected to an AC voltage source. What role does the primary coil play? | It steps up the voltage | It steps down the voltage | It generates a magnetic field | It transfers electrical energy to the load | 4 | Which type of transformer increases the voltage from the primary coil to the secondary coil? | Step-up transformer | Step-down transformer | Isolation transformer | Autotransformer | 5 | What component of an AC generator is responsible for generating a changing magnetic field? | Armature | Commutator | Stator | Rotor | 6 | What is the device used to convert mechanical energy into electrical energy through electromagnetic induction? | Transformer | Capacitor | AC generator | Diode | 7 | A step-down transformer is commonly used in: | Power distribution networks | Electrical substations | High-voltage transmission lines | Electronic devices | 8 | Electromagnetic induction is the process of: | Generating electricity from chemical reactions | Generating a magnetic field from an electric current | Generating an electric current by changing magnetic flux | Generating heat from electric current | 9 | What is the function of the commutator in a DC motor? | It reverses the direction of current in the armature coil | It regulates the speed of the motor | It increases the torque produced by the motor | It provides a path for current to flow to the armature | 10 | Which law governs the force experienced by a current-carrying conductor in a magnetic field? | Ohm's law | Faraday's law | Ampere's law | Lorentz force law | 11 | What is the primary source of energy that drives an AC generator? | Mechanical energy | Electrical energy | Chemical energy | Nuclear energy | 12 | What happens to the force experienced by a current-carrying conductor placed in a magnetic field if the current direction is reversed? | The force remains the same | The force increases | The force decreases | The force changes direction |