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Physics
List of top Physics Questions
A magnet is situated near a closed conductor. Current can be produced in the conductor if:
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Bihar Board XII
Physics
Electromagnetism
The nature of electron beams moving with uniform velocity in the same direction will be:
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Bihar Board XII
Physics
Electrostatics
On oscillating any metallic sphere in a magnetic field, its oscillatory motion is:
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Bihar Board XII
Physics
Electromagnetism
The value of current obtained in a moving coil galvanometer is proportional to:
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Bihar Board XII
Physics
Alternating current
The value of torque \( \boldsymbol{\tau} \) experienced by a current loop of magnetic moment \( \mathbf{m} \) placed in a magnetic field \( \mathbf{B} \) is:
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Bihar Board XII
Physics
Magnetism
The SI unit of self-induction is:
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Bihar Board XII
Physics
Electromagnetism
If \( n \) equal resistors are first connected in series and then in parallel, the ratio of maximum to minimum resistance will be:
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Bihar Board XII
Physics
Power in Electric Circuits
The value of \((p_0 g q)^{1/2}\) is:
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Bihar Board XII
Physics
Alternating current
An electron of charge \( e \) moves parallel to uniform lines of force in a magnetic field \( B \) with velocity \( v \). The force acting on the electron is:
Bihar Board XII - 2024
Bihar Board XII
Physics
Alternating current
Kirchhoff's second law of electricity is related to:
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Bihar Board XII
Physics
Power in Electric Circuits
Which one of the following is NOT a unit of magnetic field?
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Bihar Board XII
Physics
Magnetism
To increase the sensitivity of a potentiometer:
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Bihar Board XII
Physics
Power in Electric Circuits
The dielectric constant of a metal is:
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Bihar Board XII
Physics
Electrostatics
Two bulbs of 40 W and 60 W are connected to a 220 V source. The ratio of their resistances will be:
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Bihar Board XII
Physics
Power in Electric Circuits
The resistance of a wire is 500 \(\Omega\). Its electrical conductivity will be:
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Bihar Board XII
Physics
Power in Electric Circuits
The capacity of a spherical conductor is \(1.0\) pF. Its radius will be:
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Bihar Board XII
Physics
Electrostatics
Picofarad is the unit of:
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Bihar Board XII
Physics
Electrostatics
Which of the following is blocked by a capacitor?
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Bihar Board XII
Physics
Semiconductor electronics: materials, devices and simple circuits
The capacity of any condenser does not depend upon:
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Bihar Board XII
Physics
Electrostatics
The electrostatic energy of the system made by two electric dipoles kept at a distance \( r \) is proportional to:
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Bihar Board XII
Physics
Electrostatics
The relation between electric field \( E \) and electric potential \( V \) is:
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Bihar Board XII
Physics
Electrostatics
An electron is accelerated through a potential difference of 5 volts. The energy gained by the electron will be:
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Bihar Board XII
Physics
Electrostatics
In broad-side-on position, the electric potential due to an electric dipole is:
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Bihar Board XII
Physics
Electrostatics
If \( n \) electric dipoles are situated inside a closed surface, the total electric flux coming out from the closed surface will be:
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Bihar Board XII
Physics
Electrostatics
Two equal and opposite charges of 5 coulomb are kept mutually at a distance of 50 cm. The electric dipole moment of the system is:
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Bihar Board XII
Physics
Electrostatics
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