The fringe spacing in double slit experiment can be increased by? increasing the separation of slits decreasing the distance between the slit and screen using monochromatic light of shorter wavelength than before None of these
A red shirt? Selectively scatters red wavelengths of visible light and absorbs the rest Selectively absorbs red wavelengths of visible light and scatters the rest None of these
Two gasses A and B having same no of molecules are at temp 10C. A is heated at constant volume and B is heated at constant pressure and their temp rises to 20C. Increase in internal energy in? A > B A < B In both gasses is same None of these
The pendulums in vintage clocks usually are? second pendulum torsional pendulum any pendulum can fits there
A spring is cut into 2 equal parts and are connected in series. Effective spring constant is? (Spring constant is k).? k 2k 4k None of these
A spring is cut into 2 equal parts and are connected in parallel. Effective spring constant is? (Spring constant is k).? k 2k 4k None of these
A simple pendulum of length 160 m oscillates with an angular amplitude of 0.01 rad. Find the angular frequency when the bob is in momentary rest. Take g = 10 m/s2? 1 Hz 4 Hz 16 Hz None of these
In a case of simple pendulum, during a complete oscillation, the work done by the string is equal to:? mgh mghsin@ Zero None of these
If a body, moving in simple harmonic motion, makes 40 complete oscillations in 10 seconds, what is its angular frequency (in rad/s)? 4π 8π 80π None of these
When a body moves in un-damped simple harmonic motion, the following set of physical quantities remains constant?? total energy, acceleration, amplitude kinetic energy, acceleration, angular frequency total energy, amplitude, angular frequency None of these
In SHM, the velocity of the particle is maximum at? Mean position Extreme Position None of these
In a close pipe, fundamental frequency is 10 Hz, the second overtone will be observed at which frequency?? 20 Hz 30 Hz 40 Hz 50 Hz None of these
In an open pipe, fundamental frequency is 10 Hz, the second overtone will be observed at which frequency?? 20 Hz 30 Hz 40 Hz 50 Hz None of these
The speed of sound is greater in solids due to their high? Density Elasticity Viscosity None of these
The formulae for speed in relation to tension is given as: v = sqrt(F/m). What is the dimension of mass here?? [M] [M/L] [M/T] [M^2] None of these
A white light when passed through prism is? Deviated Dispersed None of these
40 dB + 44 dB = ?? 40 dB 41 dB 44 dB 45 dB
A string fixed at both ends forms standing waves with node separation of 10 cm. If the velocity of waves traveling time string is 4 m/s, then the frequency or vibration of the string will be_______? 20 Hz 40 Hz 10 Hz 1 Hz None of these
If the focal length of convex lens is 50cm, then its power is? +2D -2D -5D None of these
In Young’s double slit experiment, fringe spacing will be minimum if we use? Blue light Red light yellow light green light
