The Magnetic Effects and Electromagnetic Induction 2 category gathers questions focused on magnetic phenomena and the principles of electromagnetic induction. It helps learners deepen their understanding of concepts such as induced emf, Lenz’s law, and related applications in physics.
2E 0 /π is correct per The average e.m.f. during the positive h principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
2.5 A is correct per A circuit element 'X' when connected to principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
155.8 J is correct per A magnetized needle of the magnetic mome principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
North-south is correct per Identify the direction in which a thin l principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
155.8 J is correct per A magnetized needle of the magnetic mome principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
25 Am is correct per A bar magnet of the magnetic moment 5 Am principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
Repulsion is correct per A magnet can only repel another magnet. principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
0.065 A is correct per What is the rms value of output current principle; validated by standard physics law.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
Bandwidth = fr/Q=160kHz/100=1.6kHz per Q=fr/Δf.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
Transformer Is/Ip=Np/Ns=1/20, so Ip/Is=20, current inverse to turns.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
AC reverses every half cycle: T=1/f=0.02s, reverse time T/2=0.01s.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
Wattless current when φ=90° between I and V, cosφ=0, power zero.
Ref: NCERT Physics Class 12 Chapter 4 Moving Charges and Magnetism
