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Assertion & Reason Test: Current Electricity - NEET MCQ


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10 Questions MCQ Test Topic-wise MCQ Tests for NEET - Assertion & Reason Test: Current Electricity

Assertion & Reason Test: Current Electricity for NEET 2024 is part of Topic-wise MCQ Tests for NEET preparation. The Assertion & Reason Test: Current Electricity questions and answers have been prepared according to the NEET exam syllabus.The Assertion & Reason Test: Current Electricity MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Current Electricity below.
Solutions of Assertion & Reason Test: Current Electricity questions in English are available as part of our Topic-wise MCQ Tests for NEET for NEET & Assertion & Reason Test: Current Electricity solutions in Hindi for Topic-wise MCQ Tests for NEET course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Assertion & Reason Test: Current Electricity | 10 questions in 20 minutes | Mock test for NEET preparation | Free important questions MCQ to study Topic-wise MCQ Tests for NEET for NEET Exam | Download free PDF with solutions
Assertion & Reason Test: Current Electricity - Question 1
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Fuse wire has high resistance and low melting point.

Reason (R): Fuse wire is for small current flow only.

Detailed Solution for Assertion & Reason Test: Current Electricity - Question 1
Fuse wire should melt and disconnect the circuit from mains supply if the current increases beyond a rated value. For this reason, its resistance should be high for more heat generation and melting point should be low for fast melting. So the assertion is correct. Fuse wire is not for small current flow. Fuse wire may be of various current ratings depending on the type of appliance being used and the capacity of the wiring. So, the reason is false.
Assertion & Reason Test: Current Electricity - Question 2
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): The resistance of the superconductor is zero.

Reason (R): Superconductors are used for electrical power transmission.

Detailed Solution for Assertion & Reason Test: Current Electricity - Question 2
Resistance of the superconductor falls to zero at critical temperature. This property is very useful for power transmission without any loss. Assertion and reason both are true but reason does not explain the assertion.
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Assertion & Reason Test: Current Electricity - Question 3
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Power rating of resistance is not so important when used in a circuit.

Reason (R): The resistance value changes with temperature.

Detailed Solution for Assertion & Reason Test: Current Electricity - Question 3
Power rating describes the heat dissipation capability of the resistor. If the heat generated is more than the power rating of the resistor, it will burn. So the assertion is false. Resistance value is temperature dependent. So, the reason is true, But reason does not explain the assertion.
Assertion & Reason Test: Current Electricity - Question 4
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Kirchhoff ’s voltage law indicates that the electric field is conservative.

Reason (R): Potential difference between two points in a circuit does not depend on the path.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 4
Kirchhoff ’s voltage law says that the sum of the voltages around any closed loop is zero. A closed loop starts from a node, traces a path through the circuit and returns to the same node. Since the total work done in moving a charge around this close path the zero, hence the electric field is conservative. So, the assertion is true. Potential difference between two points in a circuit does not depend on the path. This is true for conservative fields. Hence the reason is also true and it explains the assertion.
Assertion & Reason Test: Current Electricity - Question 5
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): In the balanced condition of a Wheatstone bridge, there is no current flow through the galvanometer.

Reason (R): The potential of point B and D are the same.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 5
In the balanced condition of a Wheatstone bridge, there is no current flow through the galvanometer. This is also called null condition. So, the assertion is true. When the potential of point B and D are same then only there is no current flow through the galvanometer. Hence the reason is also true and explains the assertion.
Assertion & Reason Test: Current Electricity - Question 6
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Meter bridge wire is generally made of Constantan.

Reason (R): Constantan has a very low temperature coefficient of resistance.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 6
Meter bridge wire is generally made of Constantan. The assertion is true. Temperature coefficient of resistance of Constantan is very low. So, its resistance variation is negligible even after long use. This is the requirement of an ideal meter bridge. So the reason is true and properly explains the assertion.
Assertion & Reason Test: Current Electricity - Question 7
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Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.

Assertion (A): Potentiometer is used to measure the e.m.f. of a cell.

Reason (R): Potentiometer is preferred over voltmeter to measure the e.m.f. a cell since it does not draw any net current from the cell.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 7
Potentiometer is used to measure the e.m.f. of a cell. The assertion is true. Voltmeter draws certain amount of current from the cell. So, V = E – iR. The measured value by the voltmeter is less than the actual e.m.f. of the cell. But the potentiometer draws no net current at balance point, hence it measures the actual e.m.f. of the cell. So, the reason is also true and explains the assertion properly.
Assertion & Reason Test: Current Electricity - Question 8
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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : In a simple battery circuit, the point of the lowest potential is the positive terminal of the battery.

Reason : The current flows towards the point of the higher potential, as it does in such a circuit from the negative to the positive terminal.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 8
In a simple electric circuit, electrons flow from the negative - terminal to the positive - terminal. But in general, the positive - terminal of the battery is considered to be the point of higher potential. Therefore, the Assertion is wrong.
Assertion & Reason Test: Current Electricity - Question 9
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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : Voltmeter is connected in parallel with the circuit.

Reason : Resistance of a voltmeter is very large.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 9
Voltmeter is a galvanometer with high resistance. It measures potential drop across any part of an electrical circuit. It is connected in parallel so that it does not draw any current itself (due to high resistance) and does not affect net resistance of the circuit.
Assertion & Reason Test: Current Electricity - Question 10
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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.

Assertion : An electric bulb becomes dim, when the electric heater in parallel circuit is switched on.

Reason : Dimness decreases after sometime.
Detailed Solution for Assertion & Reason Test: Current Electricity - Question 10
The electric power of a heater is more than that of a bulb. As P∝1/R; P∝1R, , the resistance of heater is less than that of the electric R bulb. When a heater connected in parallel to the bulb is switched on, it draws more current due to its lesser resistance, consequently, the current through the bulb decreases and so it becomes dim. When the heater coil becomes sufficiently hot, its resistance becomes more and then it draws a little lesser current. Consequently, the current through the electric bulb recovers. Hence, dimness of the bulb decreases.
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