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Question 1 A plant with Green leaves placed in red light will appear  Black  Green  Red  Violet Black.

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Presentation on theme: "Question 1 A plant with Green leaves placed in red light will appear  Black  Green  Red  Violet Black."— Presentation transcript:

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2 Question 1 A plant with Green leaves placed in red light will appear  Black  Green  Red  Violet Black

3 Electrons Question 2 Electromagnetic radiation is emitted by  X-rays  Electrons  Ultrasonic  Protons

4 Freon/ammonia Question 3 The common refrigerant used in the domestic refrigerator is  Neon  Freon/ammonia  Spirit  None of these

5 High resistance & Low melting point Question 4 A fuse wire is characterized by  High resistance & High melting point  Low resistance & High melting point  High resistance & Low melting point  Low resistance & Low melting point

6 Newton Question 5 Who said ‘A body will remain at rest unless an external force acts on the body’?  Newton  Einstein  Archimedes  Galileo

7 Iron Question 6 Which metal is commonly used as an electromagnet?  Copper  Nickel  Iron  Cabalt

8 Remain the same Question 7 When ice melts in a beaker of water, the level of water in the beaker will  Increases  Decreases  Remain the same  First increases & then decreases

9 Question 8 Which of the following does not admit any division?  Atom  Molecules  Compound  All Atom

10 Question 9 The dynamo converts  Mechanical energy into electrical energy  Electrical energy into mechanical energy  Mechanical energy into magnetic energy  None of these Mechanical energy into electrical energy

11 Coulomb Question 10 The M.K.S unit of electric charge is  Volt  Ampere  Watt  Coulomb

12 Question 11 The oil in the wick of an oil lamp rises up due to  Pressure difference  Low viscosity of oil  Capillary action  Gravitational force Capillary action

13 Give relatively large impedance of alternating current Question 12 The function of the choke is to  Give relatively large impedance of alternating current  Give relatively large impedance or direct current  Regulate the voltage  Increases the voltage

14 Increases over 10% Question 13 If the length of a heater coil is reduced by 10% of its original length, then power consumed by the heater will  Increases over 10%  Decreases by 10%  Decreases by 0.5%  Increases by 0.5%

15 It has the longest wavelength & can be easily noticed from the long distace Question 14 A red light is used in a traffic signal is because  It has the longest wavelength & can be easily noticed from the long distance  It is beautiful  It is visible to people even with bad eye sight  None of these

16 Red & Green Question 15 The most convenient colour combination that can be used for vehicles running day & night is  Orange & Blue  Yellow & Blue  White & Black  Red & Green

17 THANK YOU


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