WhatsApp Channel Join Now Telegram Group Join Now Class 10 Science Electromagnetism online quiz Welcome to your Class 10 Science Electromagnetism online quiz Which converts electrical energy into mechanical energy ? Motor Battery Generator Switch None To Convert an AC generator in to DC generator Split rings and brushes must be used A rectangular wire loop has to be used A stronger magnetic field has to be used Split - ring type commutator must be used None The most important safety method used for protecting home appliances from short circuiting or overloading is 0/1 Earthing Earthing Use of stabilizers Use of Fuse Use of Electic meter None The magnetic force on a current carrying wire placed in uniform magnetic field of the wire is oriented perpendicular to magnetic field is ___ 0 2ILB ILB/2 ILB None The value of magnetic field induction which is uniform is "2T" . What is the flux passing through a surface of area 1.5m³ perpendicular to the field is 3wb 2/1.5 wb 1.5/2 wb 0 None M.K.S units for magnetic flux are Gauss Telsa Weber None of these None Assertion: Electric motor converts electrical energy into mechanical energy. Reason: KPM stands for rotations per minute. Both assertion and reason are correct . reason supports assertion. Both assertion and reason is incorrect. Assertion correct but reason is incorrect. Both assertion and reason are correct, reason doesnot support assertion. None In hydro electric power station , which energy is transformed to electrical energy? Potential energy of water Thermal energy of water Chemical energy of water Sound energy of water None Which of the following does not affect on the coil of D.C motor? The direction of the current The number of turns in the coil The current in the coil The strength of the magnetic field None To use an electric bulb of low voltage on A.C mains of high voltage , then identify the device employed Transformer Inductor Transistor Plug key None The force applied by a remote controller on a T.V is Electrical Frictional Magnetic Fied None Which of following is also called Tesla? weber/ (metre)² Weber/metre (metre)²/ weber (weber)² metre None The relation between flux(f), field induction(B), area of loop (A) and angle (q) is ______ A B C D None Match the following.List - 1 List - 21. Generator (AC) a) Electro magnetic induction2. Solenoid b) Two stop rings3. Dynamo c) Two, half stop rings4. Generator (DC) d) Soft iron core 1-b, 2-d, 3-a, 4-c 1-d, 2-c, 3-a, 4-b 1-d, 2-b, 3-c, 4-a 1-c, 2-d, 3-a. 4-b None Which are more dangerous AC or DC? AC DC Both AC and DC None of the given None What happens when an electric current flows through a wire? The wire becomes shorter. The wire becomes longer. The wire remains unchanged. The wire becomes magnetic. None What is the unit of electric current? Volts (V) Ohms (Ω) Amperes (A) Watts (W) None In an electromagnet, increasing the number of coils in the wire will Decrease its magnetic strength. Have no effect on its magnetic strength. Increase its magnetic strength. Make it non-magnetic. None When a current-carrying conductor is placed in a magnetic field, it experiences a force. This phenomenon is described by: Ohm's Law Lenz's Law Ampere's Law Faraday's Law None Which of the following devices uses the principle of electromagnetic induction? Electric heater Solar panel Solar panel Incandescent bulb None Please fill in the comment box below. Time's up
