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 |
(a) 4/3 ohm
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The focal length of the field lens (which is an achromatic combination of two lenses) of telescope is 90 cm. The dispersive powers of the two lenses in the combination are 0.024 and 0.036. The focal lengths of two lenses are
|
(a) 30 cm and 60 cm |
(b) 30 cm and – 45 cm |
|
(c) 45 cm and 90 cm |
(d) 15 cm and 45 cm |
If a resistance 
is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of will be
|
(a) |
(b) I, 2R |
(c) |
(d) |
At a certain distance from a point charge the electric field is 500 V/m and the potential is 3000 V. What is this distance
|
(a) 6 m |
(b) 12 m |
(c) 36 m |
(d) 144 m |
Which of the following particles are constituents of the nucleus
|
(a) Protons and electrons |
(b) Protons and neutrons |
|
(c) Neutrons and electrons |
(d) Neutrons and positrons |
If a drop of water is introduced between the glass plate and a convex lens in a Newton's ring system, the ring system:
For the study of the helical structure of nucleic acids, the property of electromagnetic radiation generally used is
|
(a) Reflection |
(b) Interference |
(c) Diffraction |
(d) Polarization |
