🔬 Class 12 Physics Quiz (Medium-Hard Level)
Total Questions: 20
Marking Scheme: 1 mark each, no negative marking.
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Chapter: Electric Charges and Fields
1. Two point charges +q and -q are placed at a distance d apart. What is the electric field at the midpoint of the line joining the charges?
Chapter2: Electrostatic Potential and Capacitance
2. What is the equivalent capacitance of three capacitors 2 μF, 3 μF and 6 μF connected in series?
3. A parallel plate capacitor is filled with two dielectrics k₁ and k₂ as shown side by side. Find the net capacitance.
Chapter3: Current Electricity
4. State Kirchhoff’s loop rule and explain its basis.
5. A wire of resistance 10Ω is stretched to double its original length. What is its new resistance?
Chapter4: Moving Charges and Magnetism
6 Derive the expression for the force on a charged particle moving in a magnetic field.
7. A current-carrying circular loop lies in the plane of the table. What is the direction of the magnetic field at the center of the loop?
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Chapter5: Magnetism and Matter
8. What is the magnetic moment of a solenoid of length 20 cm, 500 turns and carrying a current of 3 A?
9. Explain the differences between diamagnetic, paramagnetic, and ferromagnetic materials with examples.
Chapter6: Electromagnetic Induction
10.A coil of area 0.01 m² with 100 turns is placed in a magnetic field which changes from 0.5 T to 0.2 T in 0.1 s. Calculate the emf induced.
Chapter7: Alternating Current
11. What is the RMS value of current if the peak value is 5 A?
12. Derive the expression for average power in an AC circuit with resistor, inductor and capacitor.
Chapter8: Electromagnetic Waves
13. Name the part of the electromagnetic spectrum used in satellite communication. Mention its frequency range.
Total Questions: 20
Marking Scheme: 1 mark each, no negative marking.
---
Chapter: Electric Charges and Fields
1. Two point charges +q and -q are placed at a distance d apart. What is the electric field at the midpoint of the line joining the charges?
Chapter2: Electrostatic Potential and Capacitance
2. What is the equivalent capacitance of three capacitors 2 μF, 3 μF and 6 μF connected in series?
3. A parallel plate capacitor is filled with two dielectrics k₁ and k₂ as shown side by side. Find the net capacitance.
Chapter3: Current Electricity
4. State Kirchhoff’s loop rule and explain its basis.
5. A wire of resistance 10Ω is stretched to double its original length. What is its new resistance?
Chapter4: Moving Charges and Magnetism
6 Derive the expression for the force on a charged particle moving in a magnetic field.
7. A current-carrying circular loop lies in the plane of the table. What is the direction of the magnetic field at the center of the loop?
---
Chapter5: Magnetism and Matter
8. What is the magnetic moment of a solenoid of length 20 cm, 500 turns and carrying a current of 3 A?
9. Explain the differences between diamagnetic, paramagnetic, and ferromagnetic materials with examples.
Chapter6: Electromagnetic Induction
10.A coil of area 0.01 m² with 100 turns is placed in a magnetic field which changes from 0.5 T to 0.2 T in 0.1 s. Calculate the emf induced.
Chapter7: Alternating Current
11. What is the RMS value of current if the peak value is 5 A?
12. Derive the expression for average power in an AC circuit with resistor, inductor and capacitor.
Chapter8: Electromagnetic Waves
13. Name the part of the electromagnetic spectrum used in satellite communication. Mention its frequency range.
