Question

The relation between the linear magnification m, the object distance u and the focal length f is

(a)  

(b)

(c)

(d)

Answer

(b)

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Similar questions

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

When no current is passed through a conductor:

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

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(d) 360 kW