MCQ
The energy stored in a charged capacitor is:
- Aon a positively charged plate
- Bon both positive and negative charged plates
- ✓in the middle region of the plates
- Dat the edge of the capacitor
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On increasing the number of electrons striking the anode of an X-ray tube, which one of the following parameters of the resulting X-rays would increase
| (a) Penetration power | (b) Frequency | (c) Wavelength | (d) Intensity |
If the energy of a hydrogen atom in nth orbit is
, then energy in the nth orbit of a singley ionized helium atom will be
|
(a) 4 |
(b) |
(c) 2 |
(d) |
What is the equivalent resistance between A and B in the figure below if R = 3Ω
|
(a) 9 Ω |
(b) 12 Ω |
(c) 15 Ω |
(d) None of these |
A beam of monochromatic blue light of wavelength 4200Å in air travels in water (μ = 4/3). Its wavelength in water will be
|
(a) 2800 Å |
(b) 5600 Å |
(c) 3150 Å |
(d) 4000 Å |