Electromagnetic Waves — Physics STD 12 Science — Question

Write Maxwell's equations.

Derive an expression for (i) induced emf and (ii) induced current when a conductor of length l is moved with a uniform velocity, normal to a uniform magnetic field B. Assume the resistance of conductor to be R.

Consider a circuit containing an ideal battery connected to a resistor. Do "work done by the battery" and "the thermal energy developed" represent two names of the same physical quantity?

If we put a cardboard (say 20cm × 20cm) between a light source and our eyes, we can't see the light. But when we put the same cardboard between a sound source and our ear, we hear the sound almost clearly. Explain.

Why is base band signal not transmitted directly? Give any two reasons.

Find an expression for intensity of transmitted light when a polaroid sheet is rotated between two crossed polaroids. In which position of the polaroid sheet will the transmitted intensity be maximum?

Calculate the de-Broglie wavelength associated with an electron accelerated by a potential difference of 400 volt.

State the right hand thumb rule for finding the direction of the magnetic field due to a current carrying circular loop.