If r be the distance of a point on the axis of a magnetic dipole from its centre
If r be the distance of a point on the axis of a magnetic dipole from its centre then the magnetic field at such a point is proportional to
Options
(a) 1/r (b) 1/r² […]
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A proton is projected with a speed of 3×10⁶ m/s horizontally from east to west.
A proton is projected with a speed of 3×10⁶ m/s horizontally from east to west. An uniform magnetic field of strength 2×10⁻³ T exist in the vertically upward direction. What would be the acceleration of […]
An isolated sphere has a capacitance of 50pF. What would be the radius of the sphere?
An isolated sphere has a capacitance of 50pF. What would be the radius of the sphere?
Options
(a) 90cm (b) 45cm (c) 11.50cm (d) 5.75cm
Correct Answer:
45cm
Explanation:
As potential of spherical charge […]
Calculate the charge on equivalent capacitance of the conbination shown in figure
Calculate the charge on equivalent capacitance of the conbination shown in figure between the points P and N
Options
(a) 450 μC (b) 225 μC (c) 350 μC (d) 900 μC
Correct Answer: […]
In a common emitter transistor amplifier, the voltage gain is
In a common emitter transistor amplifier, the voltage gain is
Options
(a) αRᴀс/Rᵢn (b) αRᵢn/Rᴀс (c) βRᴀс/Rᵢn (d) βRᵢn/Rᴀс
Correct Answer:
βRᴀс/Rᵢn
Explanation:
No explanation available. Be the first to write the explanation […]
When an input signal 1 is applied to a NOT gate, then its output is
When an input signal 1 is applied to a NOT gate, then its output is
Options
(a) 1 (b) 0 (c) either 0 or 1 (d) any positive value
Correct Answer:
0
Explanation:
When […]
In a transistor, the value of βis 100, then the value of α will be
In a transistor, the value of β is 100, then the value of α will be
Options
(a) 0.01 (b) 0.1 (c) 0.99 (d) 1
Correct Answer:
0.99
Explanation:
No explanation available. Be […]
The impurity atoms with which pure silicon may be doped to make it a p-type
The impurity atoms with which pure silicon may be doped to make it a p-type semiconductor are those of
Options
(a) phosphorous (b) antimony (c) boron (d) iron
Correct Answer:
boron
Explanation:
No […]
A beam of light of wavelength 590 nm is focussed by a converging lens of diameter
A beam of light of wavelength 590 nm is focussed by a converging lens of diameter 10 cm at a distance of 20 cm form it. Find the diameter of the disc image formed
An object is seen through a simple microscope of focal length 12 cm.
An object is seen through a simple microscope of focal length 12 cm. What will be the angular magnification produced, if the image is formed at the near point of the eye which is 25 […]