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12TH PHYSICS
Top 20 Important 5-Mark Questions
EXAM TARGET
2026
TOTAL QUESTIONS
20
SYSTEM ANALYSIS 100%
01
UNIT 1: ELECTROSTATICS
5 QUESTIONS • HIGH PRIORITY
Derive the expression for electric field due to an electric dipole at a point on its axial line.
Derive the expression for electric field due to an electric dipole at a point on its equatorial plane.
Derive the expression for electrostatic potential at a point due to an electric dipole.
Explain the construction and working of a Van de Graaff generator.
Obtain the expression for electric field due to an infinitely long charged wire using Gauss law.
02
UNIT 2: CURRENT ELECTRICITY
2 QUESTIONS • MEDIUM PRIORITY
Obtain the condition for bridge balance in Wheatstone's bridge.
Explain the determination of internal resistance of a cell using a potentiometer.
03
UNIT 3: MAGNETISM & MAGNETIC EFFECTS
2 QUESTIONS • HIGH PRIORITY
Derive the expression for magnetic field at a point on the axis of a circular coil carrying current.
Explain the principle, construction, and working of a Cyclotron.
04
UNIT 4: EMI & ALTERNATING CURRENT
2 QUESTIONS • HIGH PRIORITY
Obtain the expression for the self-inductance of a long solenoid.
Explain the construction and working of a Transformer and mention its types.
05
UNIT 5: ELECTROMAGNETIC WAVES
1 QUESTION • MEDIUM PRIORITY
List out the properties of electromagnetic waves.
06
UNIT 6 & 7: OPTICS
3 QUESTIONS • HIGH PRIORITY
Derive the Mirror Equation and obtain the expression for lateral magnification.
Derive the Lens Maker's Formula and mention its significance.
Obtain the expression for fringe width in Young's double-slit experiment.
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