- ANC
- ✓$NC^{-1}$
- C$NC^{2}$
- D$N/C^{2}$
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A primary cell has an e.m.f. of 1.5 volts, when short-circuited it gives a current of 3 amperes. The internal resistance of the cell is
|
(a) 4.5 ohm |
(b) 2 ohm |
(c) 0.5 ohm |
(d) 1/4.5 ohm |
The splitting of line into groups under the effect of electric or magnetic field is called
|
(a) Zeeman's effect |
(b) Bohr's effect |
|
(c) Heisenberg's effect |
(d) Magnetic effect |
Magnets A and B are geometrically similar but the magnetic moment of A is twice that of B. If T1 and T2 be the time periods of the oscillation when their like poles and unlike poles are kept together respectively, then
will be
|
(a) |
(b) |
(c) |
(d) |
In the adjoining circuit, the e.m.f. of the cell is 2 volt and the internal resistance is negligible. The resistance of the voltmeter is 80 ohm. The reading of the voltmeter will be
|
(a) 0.80 volt |
(b) 1.60 volt |
(c) 1.33 volt |
(d) 2.00 volt |
If the wavelength of light is 4000 Å, then the number of waves in 1 mm length will be
|
(a) 25 |
(b) 0.25 |
(c) 0.25 |
(d) 25 |
Energy conversion in a photoelectric cell takes place from
|
(a) Chemical to electrical |
(b) Magnetic to electrical |
|
(c) Optical to electrical |
(d) Mechanical to electrical |