- APerpendicular to the field.
- BFrom stronger to the weaker parts of the field.
- CFrom weaker to the stronger parts of the field.
- DNone of these.
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A substance is behaving as convex lens in air and concave in water, then its refractive index is
|
(a) Smaller than air |
(b) Greater than both air and water |
|
(c) Greater than air but less than water |
(d) Almost equal to water |
A potential difference of 300 volts is applied to a combination of 2.0mF and 8.0mF capacitors connected in series. The charge on the 2.0mF capacitor is
|
(a) 2.4 |
(b) 4.8 |
(c) 7.2 |
(d) 9.6 |
A long magnetic needle of length 2L, magnetic moment M and pole strength m units is broken into two pieces at the middle. The magnetic moment and pole strength of each piece will be
|
(a) |
(b) M, |
(c) |
(d) M, m |
The resistance of a cell does not depend on
|
(a) Current drawn from the cell |
(b)Temperature of electrolyte |
|
(c) Concentration of electrolyte |
(d) The e.m.f. of the cell |
has half life 5700 years. At the end of 11400 years, the actual amount left is
|
(a) 0.5 of original amount |
(b) 0.25 of original amount |
|
(c) 0.125 of original amount |
(d) 0.0625 of original amount |
The reason of seeing the Sun a little before the sunrise is
|
(a) Reflection of the light |
(b) Refraction of the light |
|
(c) Scattering of the light |
(d) Dispersion of the light |
X-rays are not used for radar purpose because
| (a) They are not reflected by the target |
| (b) They are not electromagnetic waves |
| (c) They are completely absorbed by the air |
| (d) They sometimes damage the target |