A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m.
A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m. The power of the source is
Options
(a) 20 W (b) 25 W (c) 40 W […]
Questions
The frequency of fundamental tone in an open organ pipe of length
The frequency of fundamental tone in an open organ pipe of length 0.48 m is to 320 Hz. Speed of sound is 320 m/s. Frequency of fundamental tone in closed organ pipe will be
Two closed pipes produce 10 beats per second when emitting their fundamental nodes.
Two closed pipes produce 10 beats per second when emitting their fundamental nodes. If their lengths are in the ratio of 25:26, then their fundamental frequencies in Hz are
Options
(a) 270280 (b) […]
In Young’s double slit experiment, the phase difference between the two waves
In Young’s double slit experiment, the phase difference between the two waves reaching at the location of the third dark fringe is
Options
(a) π (b) 3π/2 (c) 5π (d) 3π
Correct Answer:
3π/2
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5×10⁻⁵ cm. The […]
If a given volume of water in a 220V heater is boiled in 5 min, then same volume
If a given volume of water in a 220V heater is boiled in 5 min, then same volume of water in 110V heater can be boiled in what time interval?
Options
(a) 20 […]
At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
At 0⁰C, 15 gm of ice melts to form water at 0⁰C. The change in entropy is
Options
(a) zero (b) 18.5 (c) 15 (d) None of these
Correct Answer:
18.5
Explanation:
Heat […]
A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens
A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, then its focal length will be
An object is seen through a simple microscope of focal length 12 cm.
An object is seen through a simple microscope of focal length 12 cm. What will be the angular magnification produced, if the image is formed at the near point of the eye which is 25 […]
A sample of radioactive element has a mass of 10 gram at an instant t=0.
A sample of radioactive element has a mass of 10 gram at an instant t=0. The approximate mass of this element in the sample after two mean lives is
Options
(a) 2.50 gram (b) […]