a coil and a bulb are connected in series with a dc source. a soft iron core is then inserted in the coil. then in steady state condition
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A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil, then
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Question
A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil, then
AIntensity of the bulb remains the same
BIntensity of the bulb decreases
CIntensity of the bulb increases
DThe bulb ceases to glow
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Correct option is A)
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A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then (1) Intensity of the bulb remains the same (2) Intensity of the bulb decreases (3) Intensity of the bulb increases (4) The bulb ceases to glow Electromagnetic Induction Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers
A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then (1) Intensity of the bulb remains the same (2) Intensity of the bulb decreases (3) Intensity of the bulb increases (4) The bulb ceases to glow Electromagnetic Induction Physics Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level
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A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then
(1) Intensity of the bulb remains the same
(2) Intensity of the bulb decreases
(3) Intensity of the bulb increases
(4) The bulb ceases to glow
Q26: From NCERT
Subtopic: Self - Inductance |
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The inductance of a coil is 60μH. A current in this coil increases from 1.0 A to 1.5 A in 0.1 second. The magnitude of the induced e.m.f. is
(1) 60 × 10–6 V (2) 300 × 10–4 V (3) 30 × 10–4 V (4) 3 × 10–4 V Q27: 82% From NCERT
Subtopic: Self - Inductance |
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The self inductance of a coil is L. Keeping the length and area same, the number of turns in the coil is increased to four times. The self inductance of the coil will now be
(1) 1 4 L 14L (2) L (3) 4 L (4) 16 L Q28: 73% From NCERT
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A coil has an inductance of 2.5 H and a resistance of 0.5 r. If the coil is suddenly connected across a 6.0 volt battery, then the time required for the current to rise 0.63 of its final value is
(1) 3.5 sec (2) 4.0 sec (3) 4.5 sec (4) 5.0 sec Q29: 59%
Subtopic: LR circuit |
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Pure inductance of 3.0 H is connected as shown below. The equivalent inductance of the circuit is
(1) 1 H (2) 2 H (3) 3 H (4) 9 H Q30: 76%
Subtopic: Self - Inductance |
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If a current of 10 A flows in one second through a coil, and the induced e.m.f. is 10 V, then the self-inductance of the coil is
(1) 2 5 H 25H (2) 4 5 H 45H (3) 5 4 H 54H (4) 1 H Q31: 94% From NCERT
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The adjoining figure shows two bulbs B1 and B2 resistor R and an inductor L. When the switch S is turned off
(1) Both B1 and B2 die out promptly
(2) Both B1 and B2 die out with some delay
(3) B1 dies out promptly but B2 with some delay
(4) B2 dies out promptly but B1 with some delay
Q32:
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An inductance L and a resistance R are first connected to a battery. After some time the battery is disconnected but L and R remain connected in a closed circuit. Then the current reduces to 37% of its initial value in time ?
(1) RL sec (2) R L s e c RLsec (3) L R s e c LRsec (4) 1 L R s e c 1LRsec Q33: 79%
Subtopic: LR circuit |
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A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then
There will be self-induction effect when soft iron core is inserted.
A coil and a bulb are connected in series with a
d c
source, a soft iron core is then inserted in the coil. Then
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A2Z-ELECTROMAGNETIC INDUCTION-SECTION D - CHAPTER END TEST
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Updated On: 27-06-2022
Text Solution A
Intensity of the bulb remains in the same
B
intensity of the bulb decreases
C
intensity of the bulb increases
D
the bulb ceases to glow
Answer
The correct Answer is B
Solution
There will be self-induction effect when soft iron core is inserted.
Answer
Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
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Guys, does anyone know the answer?