- ACircles.
- BParabola.
- CStraight line.
- DEllipse.
Explanation:
A paramagnet magnet behaves like a solenoid because both contain currents in the form of circle. The magnetic field is generated by the circular motion of the electron inside the atom.
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The total capacity of the system of capacitors shown in the adjoining figure between the points A and B is
|
(a) 1 μF |
(b) 2 μF |
(c) 3 μF |
(d) 4 μF |
Spherical aberration in a lens
|
(a) Is minimum when most of the deviation is at the first surface |
|
(b) Is minimum when most of the deviation is at the second surface |
|
(c) Is minimum when the total deviation is equally distributed over the two surface |
|
(d) Does not depend on the above consideration |
In the figure a carbon resistor has bands of different colours on its body as mentioned in the figure. The value of the resistance is
|
(a) 2.2 k W |
(b) 3.3 k W |
(c) 5.6 k W |
(d) 9.1 k W |
Three identical capacitors are given a charge Q each and they are then allowed to discharge through resistance R1, R2 and R3. Their charges, as a function of time shown in the graph below. The smallest of the three resistance is
|
(a) R3 |
(b) R2 |
(c) R1 |
(d) Cannot be predicted |
The north pole of a magnet is brought near a metallic ring. The direction of the induced current in the ring will be
|
(a) Clockwise |
(b) Anticlockwise |
(c) Towards north |
(d) Towards south |
$\sqrt{\text{gl}}$
$\sqrt{2\text{gl}}$
$\sqrt{3\text{gl}}$
$\sqrt{5\text{gl}}$