Physics

Important Questions for Class 12 Physics Chapter 4 Moving Charges and Magnetism

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Moving Charges and Magnetism Class 12 Important Questions Very Short Answer Type Question 1.What is the direction of the force acting on a charged particle q, moving with a velocity v→ in a uniform magnetic field B? (Delhi)Answer:The direction of the force acting on a charged particle q, moving with a velocity v→ in a uniformmagnetic field B→ is perpendicular to …

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Important Questions for Class 12 Physics Chapter 3 Current Electricity

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Current Electricity Class 12 Important Questions Very Short Answer Type Question 1.The plot of the variation of potential difference across a combination of three identical cells in series, versus current is as shown in the figure. What is the emf of each cell? (Delhi 2008)Answer:Total emf of three cells in series = P.D corresponding to …

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Important Questions for Class 12 Physics Chapter 2 Electrostatic Potential and Capacitance

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Electrostatic Potential and Capacitance Class 12 Important Questions Very Short Answer Type Question 1.A 500 µC charge is at the centre of a square of side 10 cm. Find the work done in moving a charge of 10 µC between two diagonally opposite points on the square. (Delhi 2008)Answer:The work done in moving a charge …

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Important Questions for Class 12 Physics Chapter 1 Electric Charges and Fields

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Electric Charges and Fields Class 12 Important Questions Very Short Answer Type Question 1.Which orientation of an electric dipole in a uniform electric field would correspond to stable equilibrium ? (All India 2008)Answer:When dipole moment vector is parallel to electric field vectorP→∥E→ Question 2.If the radius of the Gaussian surface enclosing a charge is halved, …

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CBSE Previous Year Question Papers Class 12 Physics 2014 Delhi

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CBSE Previous Year Question Papers Class 12 Physics 2014 Delhi Set-I Question 1.Define the term ‘mobility’ of charge carriers in a conductor, write its S.I. unit. [1]Answer :Mobility of charge carriers in a conductor is defined as the magnitude of their drift velocity per unit applied electric field.Mobility, μ = Drift of electric fieldμ=vdES.I. unit …

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CBSE Previous Year Question Papers Class 12 Physics 2014 Outside Delhi Set-I

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CBSE Previous Year Question Papers Class 12 Physics 2014 Outside Delhi Set-I Question 1.Using the concept of force between two infinitely long parallel current carrying conductors, define one ampere of current. [1]Answer :One ampere is the current which when flowing through each of the two parallel uniform long linear conductors placed in free space at …

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CBSE Previous Year Question Papers Class 12 Physics 2015 Delhi

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CBSE Previous Year Question Papers Class 12 Physics 2015 Delhi Section-A Question 1.Define capacitor reactance. Write its S.I. units. [1]Answer :Capacitor reactance is the resistance offered by a capacitor to the flow of a.c. It is given byQuestion 2.What is the electric flux through a cube of side 1 cm which encloses an electric dipole …

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CBSE Previous Year Question Papers Class 12 Physics 2015 Outside Delhi

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CBSE Previous Year Question Papers Class 12 Physics 2015 Outside Delhi Section-A Question 1.Define the term ‘self-inductance’ of a coil. Write its S.I. unit. [1]Answer:Self-inductance of a coil is numerically equal to the amount of magnetic flux linked with the coil when unit current flows through the coil. The S.I. unit of self inductance is …

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CBSE Previous Year Question Papers Class 12 Physics 2016 Delhi

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CBSE Previous Year Question Papers Class 12 Physics 2016 Delhi Section – A Question 1.A point charge +Q is placed at point O as shown in the figure. Is the potential difference VA – VB positive, negative or zero ? [1]Answer :Potential at a distance r from a given point charge Q is given byQuestion 2.How does …

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CBSE Previous Year Question Papers Class 12 Physics 2016 Outside Delhi

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CBSE Previous Year Question Papers Class 12 Physics 2016 Outside Delhi Section — A Question 1.A charge ‘q’ is moved from a point A above a dipole of dipole moment ‘p’ to a point B below the dipole in equatorial plane without acceleration. Find the work done in the process. [1]Answer:Work done, W = q(VB – …

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