The relation between the linear magnification m, the object distance u and the focal length f is
|
(a) |
(b) |
(c) |
(d) |
The relation between the linear magnification m, the object distance u and the focal length f is
|
(a) |
(b) |
(c) |
(d) |
(b)
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A nucleus is bombarded with a high speed neutron so that resulting nucleus is a radioactive one. This phenomenon is called
| (a) Artificial radioactivity | (b) Fusion | (c) Fission | (d) Radioactivity |
The time period of a vibration magnetometer is T0. Its magnet is replaced by another magnet whose moment of inertia is 3 times and magnetic moment is 1/3 of the initial magnet. The time period now will be
|
(a) 3T0 |
(b) T0 |
(c) |
(d) T0/3 |
Assertion : According to classical theory, the proposed path of an electron in Rutherford atom model will be parabolic.
Reason : According to electromagnetic theory an accelerated particle continuously emits radiation.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If assertion is false but reason is true. |
Two rods of same material and length have their electric resistance in ratio 1 : 2. When both rods are dipped in water, the correct statement will be
|
(a) A has more loss of weight |
(b) B has more loss of weight |
|
(c) Both have same loss of weight |
(d) Loss of weight will be in the ratio 1 : 2 |
Three resistors each of 2 ohm are connected together in a triangular shape. The resistance between any two vertices will be
|
(a) 4/3 ohm |
(b) 3/4 ohm |
(c) 3 ohm |
(d) 6 ohm |
The current in the given circuit is
|
(a) 0.1 A |
(b) 0.2 A |
(c) 0.3 A |
(d) 0.4 A |
The control rod in a nuclear reactor is made of
|
(a) Uranium |
(b) Cadmium |
(c) Graphite |
(d) Plutonium |
The bottom of a container filled with liquid appear slightly raised because of
|
(a) Refraction |
(b) Interference |
(c) Diffraction |
(d) Reflection |
A 40 mF capacitor in a defibrillator is charged to 3000 V. The energy stored in the capacitor is sent through the patient during a pulse of duration 2ms. The power delivered to the patient is
|
(a) 45 kW |
(b) 90 kW |
(c) 180 kW |
(d) 360 kW |