Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 second, given L = 10 mH
|
(a) 1 V |
(b) 1 mV |
(c) 1 mV |
(d) 0.1 V |
Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 second, given L = 10 mH
|
(a) 1 V |
(b) 1 mV |
(c) 1 mV |
(d) 0.1 V |
(b) 1 mV
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As our eyes can not retrace the bent path of light, a stick, dipped in water, appears:
When an electric dipole is placed in a uniform electric field
then at what angle between
and
the value of torque will be maximum
|
(a) 90° |
(b) 0° |
(c) 180° |
(d) 45° |
If a = 0.98 and current through emitter ie = 20 mA, the value of b is
|
(a) 4.9 |
(b) 49 |
(c) 96 |
(d) 9.6 |
The extreme wavelengths of Paschen series are
|
(a) 0.365 μm and 0.565 μm |
(b) 0.818 μm and 1.89 μm |
|
(c) 1.45 μm and 4.04 μm |
(d) 2.27 μm and 7.43 μm |
A laser beam of pulse power 1012 watt is focussed on an object are 10–4 cm2. The energy flux in watt/ cm2 at the point of focus is
|
(a) 1020 |
(b) 1016 |
(c) 108 |
(d) 104 |
ABC is a right angled triangle in which AB = 3 cm and BC = 4 cm. And Ð ABC = p/2. The three charges +15, +12 and -20 e.s.u. are placed respectively on A, B and C. The force acting on B is
|
(a) 125 dynes |
(b) 35 dynes |
(c) 25 dynes |
(d) Zero |
The distance CP is the:
