Questions and Answers
What is the potential gradient at a point in an electric field if a force of 2.5 N is experienced by a point charge of 5 x 10-8 C?
What is the dimension of electric permittivity?
What are the capacitances of two capacitors when their equivalent capacitance in parallel is 16 µF and in series is 3 µF?
If the current in each parallel conductor is doubled and the distance between them is halved, what happens to the force between them?
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What unit is used to measure electric potential at a point in an electric field?
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What happens to the heat generated in one second if the potential difference across a conductor is doubled?
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What is the energy gained by an electron when it is accelerated under a potential difference of 200V?
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What is the resultant capacitance when four capacitors, each of capacitance 0.5µF, are connected in parallel?
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Study Notes
Objective and Very Short Type Questions with Answers
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A point charge of 5 x 10^-8 C experiences a force of 2.5 N. The electric potential gradient at that point is calculated to be 5 x 10^7 N/C.
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The dimension for electric permittivity is represented as ML^-1T^-3A^1.
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For two capacitors connected in parallel with an equivalent capacitance of 16 µF and in series with 3 µF, possible capacitances include pairs such as 4 µF and 12 µF.
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The force F between two parallel conductors, when the current is doubled and the distance halved, increases to 4F due to the relationship of current and distance in electromagnetic theory.
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The equivalent capacitance in a specified circuit arrangement may yield options such as 0.2 µF.
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The force between two charges of magnitude Q1 and Q2 separated by distance r, originally 25 N, can be reduced to 5 N by changing their separation to r/√5.
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The electric potential at a point is measured in units of Nm/C.
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If the potential difference across a conductor is doubled, the heat generated in one second will increase by four times.
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The capacity of a spherical conductor with a radius of 10 m can reach 9 x 10^9 farads.
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The expression for energy stored in a capacitor is given by 1/2 CV², which is a fundamental concept in capacitor technology.
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An electron accelerated through a potential difference of 200 V gains energy equivalent to 200 eV.
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When four capacitors, each with a capacitance of 0.5 µF, are connected in parallel, the total capacitance becomes 2 µF, illustrating the additive nature of capacitance in parallel configurations.
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Description
This quiz focuses on sample papers for +2 level students, featuring a wide array of questions including multiple choice (MCQs), very short, short, and long-type questions. Engage with well-structured questions and hints to enhance your understanding of key electrical concepts. It's an essential resource for exam preparation.
