Since, (a + b + c)2 = a2 + b2 + c2 + 2(ab + bc + ca) So, a2 + b2 + c2 = (12)2 – 2 × 50 = 44
In which direction does torque act?
In a plane electromagnetic wave. the electric field oscillates sinusoid ally at a frequency of 3 × 108 Hz and amplitude 36 V/m. Find the am...
The amount of light entering in eye is controlled by:
A stone of mass 0.08 kg is thrown vertically upwards. Give the direction and magnitude of the net force on the stone during its downward motion. Ignore ...
The speed of a fast moving electron, having total energy of 2 MeV, is nearly:
In a charged conductor, where do the electrical charges tend to reside?
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2....
A plane electromagnetic wave travels in vacuum along the z-direction. If the frequency of the wave is 20 MHz, what is its wavelength?
In order to investigate the internal atomic structure of crystals, we make use of:
The wavelength produced by a He-Ne laser corresponds to the transition in:
