MCQ questions for class 10 Science Chapter 13 Magnetic Effects of Electric Current
Question 1: The magnetic field inside a long straight solenoid carrying current is:
Zero
Stronger at the center
Uniform
Weaker at the center
Question 2: The SI unit of current is:
Volt
Ampere
Ohm
Coulomb
Question 3: The phenomenon of electromagnetic induction is:
The production of a potential difference across a conductor in a changing magnetic field
The flow of electric current in a circuit
The creation of a magnetic field by an electric current
The generation of electric charge by rubbing two materials together
Question 4: Fleming’s right-hand rule is used to find the direction of:
Magnetic field
Electric current
Force on a current-carrying conductor
Magnetic dipole
Question 5: The device used to measure electric current is called:
Ammeter
Voltmeter
Galvanometer
Ohmmeter
Question 6: The magnetic field due to a current-carrying solenoid is similar to that of a:
Bar magnet
Horseshoe magnet
Cylindrical magnet
Spherical magnet
Question 7: The electromagnetic induction was first discovered by:
Faraday
Ampere
Oersted
Volta
Question 8: The device used for producing electric current is called:
Generator
Motor
Transformer
Inductor
Question 9: The property of a coil due to which a counter emf is induced in it when the current through the coil changes is called:
Self-induction
Mutual induction
Resistance
Reactance
Question 10: The magnetic field inside a current-carrying solenoid is:
Parallel to the axis
Perpendicular to the axis
Circular
Irregular
Question 11: The process of electromagnetic induction is used in the working of:
Electric iron
Refrigerator
Generator
Electric bulb
Question 12: The force experienced by a current-carrying conductor in a magnetic field is called:
Centripetal force
Tangential force
Magnetic force
Gravitational force
Question 13: The magnetic field produced by a current-carrying conductor can be increased by:
Increasing the length of the conductor
Increasing the resistance of the conductor
Increasing the current through the conductor
Increasing the voltage across the conductor
Question 14: Which one of the following substances is ferromagnetic?
Aluminum
Copper
Iron
Silver
Question 15: The function of a split ring in an electric motor is to:
Increase the speed of the motor
Control the direction of the current
Reduce the current in the motor
Increase the current in the motor
Question 16: Which of the following statements is correct?
An electromagnet loses its magnetism when the current is switched off
A permanent magnet loses its magnetism when the current is switched off
An electromagnet and a permanent magnet both lose their magnetism when the current is switched off
None of the above
Question 17: The process of moving coil galvanometer converted into an ammeter involves connecting a:
High resistance in parallel
Low resistance in parallel
High resistance in series
Low resistance in series
Question 18: The magnetic field inside a current-carrying coil is similar to the magnetic field inside a:
Bar magnet
Horseshoe magnet
Cylindrical magnet
Spherical magnet
Question 19: Which device is used to measure the potential difference across a conductor?
Galvanometer
Voltmeter
Ammeter
Ohmmeter
Question 20: The process of galvanization involves coating iron and steel with a layer of:
Tin
Zinc
Copper
Silver
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