List of practice Questions

The displacement of a wave is given by \( y = 20 \cos(\omega t + 4x) \). The amplitude of the wave is
The function \( y = \log(\omega t) \) can represent
What is the electric field near an infinite plane sheet of charge density \( \sigma \)?
What is the minimum band-gap of the LED diode?
Which of the following waves are used in the treatment of muscle ache?
For an ideal gas, coefficient of volume expansion is given by
The correct arrangement in increasing order of wavelength of X-rays, UV rays, and microwaves is
The velocity of the proton is one-fourth the velocity of the electron. What is the ratio of the de-Broglie wavelength of an electron to that of a proton?
Two particles of masses \( m_1 = m \), \( m_2 = 2m \) and charges \( q_1 = q \), \( q_2 = 2q \) entered into uniform magnetic field. Find \( \frac{F_1}{F_2} \) (force ratio).
Work done in moving a charge of 25 C is 50 J. Calculate the potential difference between two points.
For the same resonant frequency, if \( L \) is changed from \( L \) to \( \frac{L}{3} \), then capacitance should change from \( C \) to
The angle of projection with the horizontal in terms of maximum height attained and horizontal range is given by
The displacement \( x \) of a particle varies with time \( t \), \( x = ae^{-pt} + be^{qt} \), where \( a, b, p, q \) are positive constants. The velocity of the particle will
The formula of capacitative reactance is
Two converging lenses of focal length 20 cm and 40 cm are placed in contact. The effective power of the combination is
Which of the following quantity represents the dimensions of momentum?
In an adiabatic process with the ratio of two specific heat, \( \gamma = \frac{3}{2} \), pressure is increased by \( \frac{2}{3} \% \), then decrease in the volume will be
Insulators can be charged by which of the following process?
The 18:8 stainless steel is composed of:
Which of the following statements is incorrect for furcation defect?
Knives used in gingivectomy are:
The process of making the impression material to conduct electricity is:
All of the following statements regarding self cure as compared to heat cure are true, except:
Which of the following is used to enlarge canal opening?
Law of symmetry is not followed by: