MEDIUM
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IMPORTANT
Earn 100

Calculate electric potential due to a point charge at a point at a distance from it.

Important Questions on Solved Physics Paper-2
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12th Haryana Board
IMPORTANT
Light of wavelength falls on a metal surface of work function . Find the kinetic energy of photoelectrons. Take:

EASY
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IMPORTANT
Explain the difference between terminal voltage and emf of a cell.

MEDIUM
12th Haryana Board
IMPORTANT
A plane electromagnetic wave travels in free space along the X-direction. At a particular point in space the maximum value of is . What is at this point ().

MEDIUM
12th Haryana Board
IMPORTANT
What is the ratio of radii of the orbits corresponding to first excited state and ground state in a hydrogen atom?

MEDIUM
12th Haryana Board
IMPORTANT
Three resistors and are combined in series. What is the total resistance of the combination? If the combination is connected to a battery of emf and negligible internal resistance, obtain the potential drop across each resistor.

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12th Haryana Board
IMPORTANT
A toroid has a core (non-ferromagnetic) of inner radius and outer radius , around which turns of a wire are wound. If the current in the wire is , what is the magnetic field outside the toroid, inside the core of the toroid? Take,

MEDIUM
12th Haryana Board
IMPORTANT
An ammeter shows that an alternator is delivering . The voltmeter reads while a watt meter shows that of power is being delivered. Find the power factor.

MEDIUM
12th Haryana Board
IMPORTANT
Find the ratio of the radii of circular paths traced by an particle and beam of proton, entering with equal velocity in perpendicular magnetic field.
