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PUNJAB BOARD PREVIOUS YEAR PAPERS-MODEL PAPER 2021-MCQ
- In a circuit, the current lags behind the voltage by a phse difference...
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- A step-up transformer is used on a 120 V line to provide a potential d...
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- For protecting a sensitive equipment form external magnetic field, it ...
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- A charged particle enters at 30^(@) to the magnetic field. Its path be...
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- The unit of electric field is not equivalent to
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- If the surface charge density of charge be sigma electric field near ...
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- Work done in moving a unit positive charge through a distance of x met...
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- The electric field at a point at distance r from the center of electri...
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- When a wire is stretched and its radius becomes (r )/(2) then its res...
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- Kirchhoff’s rules I and II prove the law of
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- A magnetic field can be produced by
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- Is there a magnetic force exerted by a magnetic field on a stationary ...
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- In a charged capacitor, the energy resides
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- What is the angle between the electric dipole moment and the electric ...
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- An electric dipole with dipole moment 4×10 ^−9 C m is aligned at 30^∘ ...
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- The no. of electric lines of force radiating from a closed surface in ...
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- The sensitivity of the potentiometer can be increased by
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- A wire has a resistance of 10.5Omega at 21^(@)C and 16.4 Omega at 14...
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- When an electron is placed in magnetic field, the velocity of electron...
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- A charge q is moving in a magnetic field, then the magnetic force does...
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