1) What is the unit of magnetic field strength? a) Watt b) Newton c) Joule d) Tesla 2) Which device converts electrical energy to mechanical energy? a) Motor b) Generator c) Transformer d) Battery 3) What is the direction of magnetic field lines outside a magnet? a) North to South b) South to North c) East to West d) West to East 4) Which rule determines the direction of force on a current-carrying conductor? a) Ohm's Law b) Right Hand Rule c) Ampere's Rule d) Fleming's Left Hand 5) What is the principle of an electric generator? a) Thermal Expansion b) Electromagnetic Induction c) Photoelectric Effect d) Chemical Reaction 6) What is the SI unit of electric current? a) Ohm b) Volt c) Ampere d) Coulomb 7) Which material is commonly used for electromagnets? a) Iron b) Copper c) Aluminum d) Plastic 8) What happens when a current-carrying conductor is placed in a magnetic field? a) Experiences Force b) No Effect c) Heats Up d) Melts 9) What is the function of a transformer? a) Store Energy b) Generate Current c) Change Voltage d) Convert Energy 10) Which law states that the induced EMF is proportional to the rate of change of magnetic flux? a) Ampere's Law b) Ohm's Law c) Lenz's Law d) Faraday's Law 11) What is the main component of a galvanometer? a) Coil b) Battery c) Resistor d) Capacitor 12) Which of these is a non-magnetic material? a) Iron b) Plastic c) Nickel d) Cobalt 13) What is the effect of increasing current in an electromagnet? a) Reverses Polarity b) Weaker Magnet c) No Change d) Stronger Magnet 14) What is the role of a commutator in a DC motor? a) Increase Voltage b) Reverse Current c) Store Energy d) Reduce Friction 15) What is the magnetic field inside a solenoid? a) Zero b) Non-uniform c) Uniform d) Variable 16) Which device measures electric current? a) Ammeter b) Voltmeter c) Galvanometer d) Ohmmeter 17) What is the effect of a magnetic field on a stationary charge? a) No Effect b) Moves Charge c) Heats Charge d) Charges Up 18) Which rule is used to find the direction of induced current? a) Fleming's Right Hand b) Left Hand Rule c) Ampere's Rule d) Ohm's Law 19) What is the effect of a magnetic field on a moving charge? a) Heats Charge b) No Effect c) Deflects Charge d) Charges Up 20) Which device converts mechanical energy to electrical energy? a) Battery b) Motor c) Transformer d) Generator

Electromagnetism - Class 10 ICSE

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