MCQ
An electron oscillating with a frequency of 3 × 106 Hz, would generate:
- AX-rays
- BUltraviolet rays
- CRadio waves
- DMicrowaves
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The imaginary line passing through the pole and the center of curvature of the curved mirror is called its _______.
Heat produced in a wire of resistance R due to current flowing at constant potential difference is proportional to
|
(a) |
(b) |
(c) R |
(d) |
A beam of light of wavelength 600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is
|
(a) 1.2 mm |
(b) 1.2 cm |
(c) 2.4 cm | (d) 2.4 mm |

Magnetic dipole moment is a
|
(a) Scalar quantity |
(b) Vector quantity |
(c) Constant quantity |
(d) None of these |