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The following question based on electric current and magnetism topic of general science mcq
(a) give less intense light
(b) give light of same intensity before
(c) give more intense light
(d) stop radiating light
The correct answers to the above question in:
Answer: (c)
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Read more physics gk Based General Science Questions and Answers
Question : 1
Consider the following statements.
Assertion (A):
Lightning conductors prevent buildings from damages in the event of lightning strike.
Reason (R):
The electric charge conduct to ground through the wire, instead of passing through the structure.
Select the correct answer using the codes given below.
Code
a) (A) is true, but (R) is false
b) Both (A) and (R) are true and (R) is the correct explanation of (A)
c) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (b)
Question : 2
The electric current does not flow between two properly connected charged bodies if they are having
a) Same resistivity
b) Same charge
c) Same capacity
d) Same potential
Answer »Answer: (d)
Question : 3
Full form of C.F.L. is
a) Chemical Fluorescent Lamp
b) Compact Fluorescent Lamp
c) Centrally Fixed Lamp
d) Condensed Fluorescent Lamp
Answer »Answer: (b)
Question : 4
Assertion (A) :
A person stands at a distance of 1m in front of a concave mirror. If the radius of curvature of the mirror is 4m, the image of the person lies at a distance 2m behind the mirror.
Reason (R) :
The general mirror equation confirms the location of the image from the mirror and it could be a real image.
a) A is true but R is false
b) Both A and R are individually true and R is the correct explanation of A
c) Both A and R are individually true but R is NOT the correct explanation of A
d) A is false but R is true
Answer »Answer: (a)
Question : 5
Two wires have their lengths, diameters and resistivities all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohm, the resistance of the thicker wire is
a) 20 ohm
b) 5 ohm
c) 10 ohm
d) 40 ohm
Answer »Answer: (c)
Question : 6
To use a transistor as an amplifier
a) no bias voltage is required
b) both junctions are forward biased
c) The emitter base junction is forward biased and the base collector junction is reverse biased
d) both junctions are reverse biased
Answer »Answer: (c)
To use a transistor as an amplifier the emitter base junction is forward biased while the collector base junction is reverse biased.
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