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What is the main principle behind the working of an electric motor?
What will happen to the volume of ozone, when it is heated?
In MRI machine, which one of the following is used?
Which of the following statements is true for a conductor in an electric field?
The wavelength produced by a He-Ne laser corresponds to the transition in:
Which of the following phenomena cannot be explained by the wave theory of light?
A transformer has 1000 turns in the primary and 100 in the secondary coil. If input voltage is 220 V, output voltage is:
The wave nature of matter was proposed by:
When is the magnetic field strength considered strongest?
A plane mirror is placed on a wall. A man walks directly toward the mirror at 2 m/s. The speed at which his image approaches him is:
