A proton is accelerated through 50,000 V. will increase Its energy by
|
(a) 5000 eV |
(b) 8 |
(c) 5000 J |
(d) 50,000 J |
A proton is accelerated through 50,000 V. will increase Its energy by
|
(a) 5000 eV |
(b) 8 |
(c) 5000 J |
(d) 50,000 J |
(a) 5000 eV
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In helium nucleus, there are
|
(a) 2 protons and 2 electrons |
(b) 2 neutrons, 2 protons and 2 electrons |
|
(c) 2 protons and 2 neutrons |
(d) 2 positrons and 2 protons |
The radius of curvature for a convex lens is 40 cm, for each surface. Its refractive index is 1.5. The focal length will be
|
(a) 40 cm |
(b) 20 cm |
(c) 80 cm |
(d) 30 cm |
A diode is connected to 220 V (rms) ac in series with a capacitor as shown in figure. The voltage across the capacitor is
|
(a) 220 V |
(b) 110 V |
(c) 311.1 V |
(d) |
A finite ladder is constructed by connecting several sections of 2μF,4 μF capacitor combinations as shown in the figure. It is terminated by a capacitor of capacitance C. What value should be chosen for C such that the equivalent capacitance of the ladder between the points A and B becomes independent of the number of sections in between
|
(a) 4μF |
(b) 2 μF |
(c) 18 μF |
(d) 6 μF |
The electric field due to a uniformly charged sphere of radius R as a function of the distance from its centre is represented graphically by
|
(a) |
(b) |
(c) |
(d) |
A conducting wire is dropped along east-west direction, then
|
(a) No emf is induced |
|
(b) No induced current flows |
|
(c) Induced current flows from west to east |
|
(d) Induced current flows from east to west |