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PUNJAB BOARD PREVIOUS YEAR PAPERS-MODEL PAPER 2021-MCQ
- The drift velocity does not depend upon:
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- The specific resistance of a condutor increases with
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- The ultimate individual unit of magnetism in any magnet is called:
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- A charged particle moving in a magnetic field experiences a resultant ...
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- In an a.c. series circuit, the instantaneous current is maximum when t...
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- The equivalent quantity of mass in electricity is:
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- Electromagnetic waves are transverse in nature is evident by
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- The velocity of electromagnetic wave is parallel to
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- The speed of electromagnetic wave in a medium of dielectric constant 2...
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- If a coil of metal is kept stationary in a non-uniform magnetic field,...
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- The induced emf in a coil is proportional to
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- 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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