Q. Which of the following is/are correctly matched?

1. Heating effect of electric current- production of heat in the resistor
2. Magnetic effect of electric current- hans Christian Oersted
3. Chemical Effect of electric current- electric fuse

Select the correct answer from the codes given below:
Answer: Only 1 and 2
Notes: When electric current flows through a resistor, such as, heating coil of nichrome wire, it gets heated up. The generation (production) of heat in a resistor (or conductor) when electricity passes through it is called heating effect of current. The heat produced in a resistor when electricity passes through it is called heating effect of current. The heat produced in a resistor when current is passed through it depends on the following factors :

• Current passed through the resistor.
• Time for which the current is passed.
• Nature of the material.

Electric fuse is the application of heating effect of current. A Danish scientist Hans Christian Oersted in 1819 discovered that when an electric current (DC) is passed through any conductor, a magnetic field is produced around it.