Current Electricity — Physics STD 12 Science — Question

Which of the following is an electromagnetic wave?

Digital signals are :

In the hysteresis cycle, the value of H needed to make the intensity of magnetism zero is called:

Light transmitted by nicol prism is:

If a capacitor is connected to two different A.C. generators, then the value of capacitive reactance is:

Two bulbs, one of 50 watt and another of 25 watt are connected in series to the mains. The ratio of the currents through them is(a) 2 : 1(b) 1 : 2(c) 1 : 1(d) Without voltage, cannot be calculated

Which of the following isotopes is likely to be most stable?

Select the right option in the following(a) Christian Huygens a contemporary of Newton established the wave theory of light by assuming that light waves were transverse(b) Maxwell provided the compelling theoretical evidence that light is transverse wave(c) Thomas Young experimentally proved the wave behaviour of light and Huygens assumption(d) All the statements give above, correctly answers the question “what is light”

Figure represents two simple harmonic motions. The parameter which has different values in the two motions is:

1. Amplitude.
2. Frequency.
3. Phase.
4. Maximum velocity.