Explanation:
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Two charges +3.2 
and -3.2
kept 2.4 Å apart forms a dipole. If it is kept in uniform electric field of intensity 4 
then what will be its electrical energy in equilibrium
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(a) + 3 |
(b) -3 |
(c) -6 |
(d) -2 |
In a full wave rectifiers, input ac current has a frequency ‘n’. The output frequency of current is
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(a) n/2 |
(b) n |
(c) 2n |
(d) None of these |
An ammeter of 5 ohm resistance can read 5 mA. If it is to be used to read 100 volts, how much resistance is to be connected in series
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(a) 19.9995 Ω |
(b) 199.995 Ω |
(c) 1999.95 Ω |
(d) 19995 Ω |
Assertion : The induced emf in a conducting loop of wire will be non zero when it rotates in a uniform magnetic field.
Reason : The emf is induced due to change in magnetic flux.
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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. |
Positive rays consists of
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(a) Electrons |
(b) Neutrons |
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(c) Positive ions |
(d) Electro magnetic waves |
Which is reverse biased diode
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(a)
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(b)
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(c)
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(d)
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