An electric dipole is placed at an angle 30°with an electric field intensity 2×10⁵N/C. It experiences a torque equal to 4N-m. The charge on the dipole, if the dipole length is 2cm is,
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A condenser of capacity C is charged to a potential difference of V₁. The plates of the condenser are then connected to an ideal inductor of inductance L. The current through the inductor when the […]
A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will
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(a) increase four times (b) be reduced to […]
The number of NAND gates required to form an AND gate is
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(a) 1 (b) 2 (c) 3 (d) 4
Correct Answer:
2
Explanation:
No explanation available. Be the first to write […]
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
Options
(a) 1.25 (b) 100 (c) 90 (d) 10
Correct Answer:
100
Explanation:
One […]
One way in which the operation of a n-p-n transistor differs from that of a p-n-p
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(a) the emitter junction is reserved biased in n-p-n (b) the emitter junction injects minority carriers […]
In an unbiased p-n junction, holes diffuse from the p-region to n-region because of
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(a) the potential difference across the p-n junction (b) the attraction of free electrons of n-region (c) the […]
Carbon,silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
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(a) The number of free electrons for conduction is significant only in […]
In a common emitter (CE) amplifier having a voltage gain G, the transistor used has transconductance 0.03 mho and current gain 25. If the above transistor is replaced with another one with transconductance 0.02 mho […]
In a n-type semiconductor, which of the following statement is true?
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(a) Electrons and minority carriers and pentavalent atoms are dopants (b) Holes and minotiry carriers and pentavalent atoms are dopants (c) […]
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