- ✓$_{26} Fe ^{56}$
- B$_8 O ^{16}$
- C$ _2 He ^4$
- D$_{92} U ^{238}$
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A region surrounding a stationary electric dipoles has
|
(a) Magnetic field only |
(b) Electric field only |
|
(c) Both electric and magnetic fields |
(d) No electric and magnetic fields |
A cube of side b has a charge q at each of its vertices. The electric field due to this charge distribution at the centre of this cube will be
|
(a) |
(b) |
(c) |
(d) Zero |
The electromagnetic waves of frequency 2 MHz to 30 MHz are
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(a) In ground wave propagation |
(b) In sky wave propagation |
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(c) In microwave propagation |
(d) In satellite communication |
Potential difference across the terminals of the battery shown in figure is (r = internal resistance of battery)
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(a) 8 V |
(b) 10 V |
(c) 6 V |
(d) Zero |
In the above figure D and E respectively represent
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(a) Absorption line of Balmer series and the ionization potential of hydrogen |
|
(b) Absorption line of Balmer series and the wavelength lesser than lowest of the Lyman series |
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(c) Spectral line of Balmer series and the maximum wavelength of Lyman series |
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(d) Spectral line of Lyman series and the absorption of greater wavelength of limiting value of Paschen series |