- AUnder heavy frequency
- BUltra-high frequency
- CUltra heavy frequency
- DUnder high frequency
Explanation:
UHF stands for Ultra high frequency. Cellular phones used radio waves to transmit voice communication in the Ultra high-frequency Band. The UHF band extends from 900 MHz to 5 x 109 Hz or 5000 MHz. Radio waves are produced by oscillating circuits having an inductor and capacitor.
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A prism having an apex angle 4o and refraction index 1.5 is located in front of a vertical plane mirror as shown in figure. Through what total angle is the ray deviated after reflection from the mirror
|
(a) 176o |
(b) 4o |
(c) 178o |
(d) 2o |
The potential at a distance R/2 from the centre of a conducting sphere of radius R will be
|
(a) 0 |
(b) |
(c) |
(d) |
The refractive index of flint glass for blue F line is 1.6333 and red C line is 1.6161. If the refractive index for yellow D line is 1.622, the dispersive power of the glass is
|
(a) 0.0276 |
(b) 0.276 |
(c) 2.76 |
(d) 0.106 |
A conducting loop carrying a current I is placed in a uniform magnetic field pointing into the plane of the paper as shown. The loop will have a tendency to

|
(a) Contract |
(b) Expand |
|
(c) Move towards +ve x –axis |
(d) Move towards –ve x-axis |