Statement-2: NOT gate inverts the input order.
Explanation:
NOT gate is also called invertor circuit since NOT gate inverts the input order. Hence, statement 1-is true statement-2 is true statement-2 is correct explanation of statement-1.
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Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam
|
(a) 75° |
(b) 55° |
(c) 35° |
(d) 15° |
A double convex lens is made of glass of refractive index 1.5. If its focal length is 30 cm, then radius of curvature of each of its curved surface is
|
(a) 10 cm |
(b) 15 cm |
(c) 18 cm |
(d) None of these |
When a resistance of 2ohm is connected across the terminals of a cell, the current is 0.5 amperes. When the resistance is increased to 5 ohm, the current is 0.25 amperes. The internal resistance of the cell is
|
(a) 0.5 ohm |
(b) 1.0 ohm |
(c) 1.5 ohm |
(d) 2.0 ohm |
The number of turns in the coil of an ac generator is 5000 and the area of the coil is 
. The coil is rotated at the rate of 100 cycles/sec in a magnetic field of 0.2
. The peak value of the emf generated is nearly
|
(a) 786 kV |
(b) 440 kV |
(c) 220 kV |
(d) 157.1 kV |
A photocell stops emission if it is maintained at 2V negative potential. The energy of most energetic photoelectron is
|
(a) 2eV |
(b) 2J |
(c) 2kJ |
(d) 2keV |
$0$
$\delta$
$2\delta$
$3\delta$