The capacity of a parallel plate condenser is C. Its capacity when the separation between the plates is halved will be
|
(a) 4 C |
(b) 2C |
(c) |
(d) |
The capacity of a parallel plate condenser is C. Its capacity when the separation between the plates is halved will be
|
(a) 4 C |
(b) 2C |
(c) |
(d) |
(b) 2C
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Five identical plates each of area A are joined as shown in the figure. The distance between the plates is d. The plates are connected to a potential difference of V volts. The charge on plates 1 and 4 will be
|
(a) |
(b) |
(c) |
(d) |
$\frac{\text{l}_1+\text{l}_2}{2}$
$\sqrt{\text{l}_2\text{l}_2}$
$\frac{\text{l}_1\text{T}_2-\text{l}_2\text{T}_1}{\text{T}_2-\text{T}_1}$
$\frac{\text{l}_1\text{T}_2+\text{l}_2\text{T}_1}{\text{T}_2+\text{T}_1}$
If a change in current of 0.01 A in one coil produces a change in magnetic flux of 1.2
in the other coil, then the mutual inductance of the two coils in henries is
|
(a) 0 |
(b) 0.5 |
(c) 1.2 |
(d) 3 |

A proton of mass 1.67
and charge 1.6
is projected with a speed of 2
m/s at an angle of 60° to the X - axis. If a uniform magnetic field of 0.104 Tesla is applied along Y - axis, the path of proton is
|
(a) A circle of radius = 0.2 m and time period |
|
(b) A circle of radius = 0.1 m and time period 2 |
|
(c) A helix of radius = 0.1 m and time period 2 |
|
(d) A helix of radius = 0.2 m and time period 4 |