- A1 × 1018 to 3 × 1022 Hz
- B3 × 10-18 to 5 × 1022 Hz
- C3 × 1018 to 5 × 1022 Hz
- D3 × 10-18 to 5 × 10-22 Hz
Explanation:
The frequency range of Gamma rays is 3 × 1018 to 5 × 1022 Hz. These rays have a wavelength of 6 × 10-13 to 10-10m. Gamma rays are produced in nuclear reactions and are also emitted by radioactive nuclei.
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Two electric charges 12μC and -6 μC are placed 20 cm apart in air. There will be a point P on the line joining these charges and outside the region between them, at which the electric potential is zero. The distance of P from -6 μC charge is
|
(a) 0.10 m |
(b) 0.15 m |
(c) 0.20 m |
(d) 0.25 m |
5 amperes of current is passed through a metallic conductor. The charge flowing in one minute in coulombs will be
|
(a) 5 |
(b) 12 |
(c) 1/12 |
(d) 300 |
Atom bomb consists of two pieces of
and a source of
|
(a) Proton |
(b) Neutron |
(c) Meson |
(d) Electron |
The resistance of a reverse biased P-N junction diode is about
|
(a) 1 ohm |
(b) |
(c) |
(d) |
The part of a transistor which is heavily doped to produce a large number of majority carriers, is
|
(a) Base |
(b) Emitter |
(c) Collector |
(d) None of these |
If an ammeter is to be used in place of a voltmeter then we must connect with the ammeter a
|
(a) Low resistance in parallel |
(b) High resistance in parallel |
|
(c) High resistance in series |
(d) Low resistance in series |