Physics Practice Question and Answer
8 Q: When a heated electric bulb glows -
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6089295dfd171c780883f3f9- 1Electrical energy is completely converted into light.false
- 2Electrical energy is partly converted into light energy and partly into heat energytrue
- 3Light energy is converted into electrical energy.false
- 4Electric energy is converted into magnetic energy .false
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Answer : 2. "Electrical energy is partly converted into light energy and partly into heat energy "
Q: Which one of the following common devices works on the basis of the principle of mutual induction?
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609399ea402c5862950ea190- 1Tubelightfalse
- 2Transformertrue
- 3Photodiodefalse
- 4LEDfalse
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Answer : 2. "Transformer"
Q: Controls the amount of light entering the eye?
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5f6da4b2ff25c92a085bb8f2- 1Iristrue
- 2pupilfalse
- 3lensfalse
- 4side musclesfalse
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Answer : 1. "Iris"
Q: The velocity of light in vacuum or air is
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61655d803ee3b5612c8e183f- 1$$3 x 10^8$$ m / sec .true
- 2$$2 x 10^4$$ m / sec .false
- 3$$9 x 10^2$$ m / sec .false
- 4$$3 x 10^11$$ m / sec .false
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Answer : 1. "$$3 x 10^8$$ m / sec . "
Q: The air bubble in the water, which will behave like it is
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5f72e7d12d9d25248e04a0c2- 1Convex mirrorfalse
- 2Convex lensfalse
- 3Concave mirrorfalse
- 4Concave lenstrue
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Answer : 4. "Concave lens"
Q: Which of the following is renewable energy?
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60b4b2a67cb636175d3d0592- 1Coalfalse
- 2Solar energytrue
- 3Natural Gasfalse
- 4Petrolfalse
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Answer : 2. "Solar energy"
Q: Is the image formed by a plane mirror always?
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5f6da46aec13dd748004ce67- 1virtual and vice versafalse
- 2Real and directfalse
- 3direct and virtualtrue
- 4Actualfalse
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Answer : 3. "direct and virtual"
Q: Match the columns.
Column - A Column-B
I. Electric current a. Henry
II. Potential difference b. Farad
III. Gapacitance c. Volt
IV. inductance d. Ampere
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649a9c63dad6f2e01f6df4c3- 1i-a, ii-b, iii-c, iv-dfalse
- 2i-b, ii-a, iii-c, iv-dfalse
- 3i-d, ii-c, iii-b, iv-atrue
- 4i-a, ii-c, iii-b, iv-dfalse
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Answer : 3. "i-d, ii-c, iii-b, iv-a"
Explanation :
The columns are a correct match.
I. Electric current - Ampere
II. Potential difference - c. Volt
III. Gapacitance - b. Farad
IV. inductance - a. Henryd.