CBSE Class 10 Magnetic Effects of Electric Current — practice questions
32 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 10 Magnetic Effects of Electric Current in the app →Who first demonstrated the link between electricity and magnetism?Magnetic field lines around a straight current-carrying wire are:Which rule gives the direction of force on a current-carrying conductor in a magnetic field?What energy conversion does an electric motor perform?In India, the frequency of AC supply is approximately:A current-carrying solenoid behaves like which of the following?Which of the following INCREASES the magnetic field at the centre of a circular current-carrying loop?Why is soft iron used as the core of an electromagnet?Two parallel wires carry currents in the SAME direction. They:In a domestic three-wire system, which wire provides the safety connection to earth?Which of the following is the working principle of an electric generator?A straight conductor of length 0.5 m carries 2 A at right angles to a 0.4 T magnetic field. The force on it isWhich device is essentially a generator producing AC?In a DC motor, what role does the split-ring commutator play?A fuse for a 10 A appliance should be rated approximately:The strength of magnetic field inside a long current carrying straight solenoid isTo convert an AC generator into DC generatorOersted's discovery (1820) was that:Magnetic field lines:Right-hand thumb rule: if the thumb of the right hand points along the direction of current in a straight wireThe magnetic field inside a long solenoid (with n turns per unit length, carrying current I) is:Fleming's left-hand rule gives the direction of:An electric motor converts:Electromagnetic induction is the phenomenon of:AC (Alternating Current) reverses its direction every:The colour code in Indian household wiring is: live = red/brown, neutral = black/blue, earth =:Earthing of an electrical appliance:A short-circuit happens when:An electromagnet differs from a permanent magnet in that the electromagnet:Direction of force on a current-carrying conductor placed in a magnetic field is reversed if:The Earth's magnetic field is roughly comparable to that of:Frequency of AC in India is: