List of top Physics Questions asked in Bihar Board Class XII

The applied voltage in an alternating circuit is 220 V. If \( R = 8 \, \Omega \) and \( X_L = X_C = 6 \, \Omega \), then find the root mean square value of voltage and impedance of the circuit.
Explain electrical resonance.
What is Curie temperature?
In series circuit with resistors \( R_1, R_2, R_3 \), the current flowing through each resistor is
The unit of current density is
If the length of a conductor is doubled while keeping the potential difference across it constant, then the drift velocity of electron will
The relative permeability (\( \mu_r \)) of ferromagnetic substance is
The direction of magnetic field inside a current carrying solenoid is
Which of the following represents resistance, R?
\( \rho = \text{resistivity}, l = \text{length of material}, A = \text{cross-sectional area} \)
The relation between drift velocity \( v \) of free electrons in conductor and potential difference \( V \) between ends of conductor is
Equivalent energy of 1 amu is
A capacitor of 100 \(\mu F\) is charged to 100 volt. The energy stored in it will be
The graph between voltage \( V \) of a conductor and current \( I \) is a straight line, which makes an angle \( \theta \) with the y-axis (which represents \( I \)). The resistance of the conductor will be
Power of electric circuit is
Which of the following has unit volt-metre\(^{-1}\)?
With the rise in temperature, the resistance of semiconductor
Which of the following is chargeless particle?
What is the main difference between isotopes of the same element?
Which series of hydrogen spectrum lies in visible portion?
Which one of the following is not a type of radioactive decay?
X-rays are
What is the energy of a photon with a wavelength of 500 nm?
(Use \( c = 3 \times 10^8 \) m/s and \( h = 6.626 \times 10^{-34} \) Js)
Which one of the following frequency ranges is used for TV transmission?
Which logic gate's output is true only if the inputs are different?
Boolean expression of NAND gate is