Question
The equivalent capacitance between A and B is
|
(a) 2 μF |
(b) 3 μF |
(c) 5 μF |
(d) 0.5 μF |
The equivalent capacitance between A and B is
|
(a) 2 μF |
(b) 3 μF |
(c) 5 μF |
(d) 0.5 μF |
(d) 0.5 μF
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Relative permeability of iron is 5500, then its magnetic susceptibility will be
|
(a) 5500 × 107 |
(b) 5500 × 10–7 |
(c) 5501 |
(d) 5499 |
An α -particle is accelerated through a potential difference of 200V. The increase in its kinetic energy is
|
(a) 100 eV |
(b) 200 eV |
(c) 400 eV |
(d) 800 eV |
An α particle and a proton travel with same velocity in a magnetic field perpendicular to the direction of their velocities, find the ratio of the radii of their circular path
|
(a) 4 : 1 |
(b) 1 : 4 |
(c) 2 : 1 |
(d) 1 : 2 |
If ne and vd be the number of electrons and drift velocity in a semiconductor. When the temperature is increased
|
(a) ne increases and vd decreases |
(b) ne decreases and vd increases |
| (c) Both ne and vd increases | (d) Both ne and vd decreases |
A step up transformer connected to a 220 V AC line is to supply 22 kV for a neon sign in secondary circuit. In primary circuit a fuse wire is connected which is to blow when the current in the secondary circuit exceeds 10 mA. The turn ratio of the transformer is
|
(a) 50 |
(b) 100 |
(c) 150 |
(d) 200 |
The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature
|
(a) Decreases exponentially with increasing band gap |
|
(b) Increases exponentially with increasing band gap |
|
(c) Decreases with increasing temperature |
|
(d) Is independent of the temperature and the band gap |