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ORDER BY `video_id` desc Electric Charge and Electric Current 9th Standard
Science A current of 2A passing through conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is__________ 0.5\(\Omega \) 2\(\Omega \) 4\(\Omega \) 20\(\Omega \) The resistance of a straight conductor is independent of__________ temperature material cross sectional area shape of cross section Two resistances R1 and R2 are connected is parallel. Their equivalent resistance is__________ R1+R2 \(\cfrac { { R }_{ 1 }{ R }_{ 2 } }{ { R }_{ 1 }+{ R }_{ 2 } } \) \(\cfrac { { R }_{ 1 }+{ R }_{ 2 } }{ { R }_{ 1 }{ R }_{ 2 } } \) \(\sqrt { { R }_{ 1 }+{ R }_{ 2 } } \) If in the circuit, power dissipation is 150 W, then R - is___________ 2\(\Omega \) 6\(\Omega \) 5\(\Omega \) 4\(\Omega \) The resistance of a conductor is R. If its length is doubled, then its new resistance will be_______________ R 2R 4R 8R Assertion (A) Electric current will not flow between two charged bodies when connected if their charges are same. If both assertion and reason are true and reason is the correct explanation of assertion If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false If assertion is false but reason is true. Assertion (A) : A bird perches on a high power line and nothing happens to the bird. If both assertion and reason are true and reason is the correct explanation of assertion. If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false If assertion is false but reason is true Define electric field. Define electric current and give its unit. Does a solar cell always maintain the potential across its terminals constant? Discuss. Rubbing a comb on hair makes the comb get – 0.4C. State Ohm’s law. On what factor does the resistance of a wire depend at a particular temperature? Calculate the amount of charge that would flow in 2 hours through an element of an electric bulb drawing a current of 2.5A. Calculate the effective resistance between A and B as shown is the figure Write the difference between resistance in series and in parallel.
9th Science - Electric Charge and Electric Current Model Question Paper
Question Bank Software Dec-07 , 2019
Electric Charge and Electric Current Model Question Paper
Reg.No. :
Reason (R) Current is the rate of flow of charge.
Reason (R) : The level of bird is very high from the ground.
(a) Find which material has lost electron and which one gained it.
(b) Find how many electrons are transferred in this process.
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