List of top Physics Questions

Write Fleming's left hand rule.
Write two properties of paramagnetic substances.
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.
Which of the following devices is based on the principle of electromagnetic induction?
How does refractive index of any medium depend upon the wavelength of light?
What do you mean by power of accommodation of eye?
The self-inductance of a solenoid depends on
What is Curie temperature?
If the length of a conductor is doubled while keeping the potential difference across it constant, then the drift velocity of electron will
In series circuit with resistors \( R_1, R_2, R_3 \), the current flowing through each resistor is
The unit of current density is
The relative permeability (\( \mu_r \)) of ferromagnetic substance is
Which of the following represents resistance, R?
\( \rho = \text{resistivity}, l = \text{length of material}, A = \text{cross-sectional area} \)
The direction of magnetic field inside a current carrying solenoid is
The relation between drift velocity \( v \) of free electrons in conductor and potential difference \( V \) between ends of conductor is
A capacitor of 100 \(\mu F\) is charged to 100 volt. The energy stored in it will be
With the rise in temperature, the resistance of semiconductor
Equivalent energy of 1 amu is
Power of electric circuit is
Which of the following has unit volt-metre\(^{-1}\)?
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
Which series of hydrogen spectrum lies in visible portion?
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 is not a type of radioactive decay?