Same current i = 2A is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1m. It is placed in uniform magnetic field B = 4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is
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(a) 24 N |
(b) Zero |
(c) 16 N |
(d) 8 N |
(a) 24 N
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The voltage gain of a triode depends upon
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(a) Filament voltage |
(b) Plate voltage |
(c) Plate resistance |
(d) Plate current |
If a spherical conductor comes out from the closed surface of the sphere then total flux emitted from the surface will be
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(a) |
(b) |
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(c) |
(d) 0 |
Assertion : The stars twinkle while the planets do not.
Reason : The stars are much bigger in size than the planets.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
$\text{A}\omega^2$
$\frac{\text{A}\omega^2}{2}$
$\frac{\text{A}\omega^2}{\sqrt{2}}$
$\text{Zero}.$
The depletion layer in silicon diode is 1 mm wide and the knee potential is 0.6 V, then the electric field in the depletion layer will be
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(a) Zero |
(b) 0.6 Vm–1 |
(c) 6 × 104 V/m |
(d) 6 × 105 V/m |
