Two capacitors connected in parallel having the capacities 
and 
are given ‘q’ charge, which is distributed among them. The ratio of the charge on and will be
|
(a) |
(b) |
(c) |
(d) |
(a) 
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The magnetic potential at a point on the axial line of a bar magnet of dipole moment M is V. What is the magnetic potential due to a bar magnet of dipole moment 
at the same point
| (a) 4V | (b) 2V |
(c) 
|
(d) 
|
In forward bias, the width of potential barrier in a P-N junction diode
| (a) Increases | (b) Decreases |
| (c) Remains constant | (d) First increases then decreases |
The magnetic susceptibility is
|
(a) |
(b) |
(c) |
(d) |
Out of gravitational, electromagnetic, Vander Waals, electrostatic and nuclear forces; which two are able to provide an attractive force between two neutrons
|
(a) Electrostatic and gravitational |
|
(b) Electrostatic and nuclear |
|
(c) Gravitational and nuclear |
|
(d) Some other forces like Vander Waals |
When original mass of star is greater than 5 M (M = mass of the sun). The death of this star will give rise to
|
(a) White dwarf |
(b) Black hole |
(c) Quasars |
(d) Nebula |
An electron initially at rest, is accelerated through a potential difference of 200 volt, so that it acquires a velocity 8.4 
. The value of e/m of electron will be
|
(a) 2.76 |
(b) 1.76 |
(c) 0.76 |
(d) None of these |
When a current passes through a wire whose different parts are maintained at different temperatures, evolution or absorption of heat all along the length of wire is known as
|
(a) Joule effect |
(b) Seebeck effect |
(c) Peltier effect |
(d) Thomson effect |
