- AVery large as compared to the load resistance.
- BEqual to the resistance of the load.
- CNon-zero but less than the resistance of the load.
- DZero.
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A long solenoid of length L has a mean diameter D. It has n layers of windings of N turns each. If it carries a current ‘i’ the magnetic field at its centre will be
|
(a) Proportional to D |
(b) Inversely proportional to D |
|
(c) Independent of D |
(d) Proportional to L |
In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of 10 ohm is connected in one gap, the value of resistance in other gap is
|
(a) 10 Ω |
(b) 5 Ω |
(c) |
(d) 500 Ω |
The wavelength of radiation emitted is
when an electron jumps from the third to the second orbit of hydrogen atom. For the electron jump from the fourth to the second orbit of the hydrogen atom, the wavelength of radiation emitted will be
|
(a) |
(b) |
(c) |
(d) |
The radius of the first (lowest) orbit of the hydrogen atom is
The radius of the second (next higher) orbit will be
|
(a) 4 |
(b) 6 |
(c) 8 |
(d) 10 |
Three capacitors each of 6μF are available. The minimum and maximum capacitances which may be obtained are
|
(a) 6 μF, 18 μF |
(b) 3 μF, 12 μF |
(c) 2 μF, 12 μF |
(d) 2 μF, 18 μF |