Some statements are given as
(i) The phenomenon of electromagnetic induction is producing electric current in a coil due to
relative motion between a magnet and the coil.
(ii) An electric motor converts mechanical energy into electrical energy.
(iii) An electric generator works on the principle of electromagnetic induction.
(iv) The field at the centre of a long circular coil(solenoid) carrying current will be parallel straight
lines.
Now choose the correct option.
(A) Statements (i), (ii) and (iii) are correct.
(B) Statements (ii), (iii) and (iv) are correct.
(C) Statements (i) and (iv) are correct.
(D) Statements (i), (iii) and (iv) are correct.
Answers
Answer:
statement (c) is correct okkkk
Answer:
(a) False
An electric motor converts electrical energy into mechanical energy. As current carrying coil is placed in a magnetic field, it experiences a force due to which it starts rotating.
(b) True
An electric generator works on the principle of electromagnetic induction. When the coil is rotated by external mechanical forces in a magnetic field, the magnetic flux through the coil changes. This creates an induced emf in the coil and hence induced current flows.
(c) True
The field at the center of a long solenoid carrying current will be parallel straight lines. This can also be verified by Right hand thumb Rule.
(d) False
Live wire has red insulation cover, whereas earth wire has green insulation colour in the domestic circuits.