Resistance Quiz Questions: Test!

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Quizzes Created: 1 | Total Attempts: 542
| Attempts: 542
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  • 1/9 Questions

    Two wires connected to different batteries but of the same voltage if one wire is thicker than the other and current flows through both the wires for the same time, then which wire heats up more.

    • The wire which is thinner will heats up more in comparison to wire which is thicker 
    • Both wires heats up equally
    • Thicker wire will heats up more 
    • Can't say
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About This Quiz

The 'Resistance Quiz Questions: Test!' evaluates understanding of electrical resistance concepts including changes in resistance due to alterations in wire dimensions, resistivity, heating effects in wires, and basic electrical relationships. It is designed to enhance learning in physics, focusing on practical and theoretical aspects of electricity and resistance.

Resistance Quiz Questions: Test! - Quiz

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  • 2. 

    The correct unit for Potential Difference or Voltage is: 

    • Joule/Coulmb

    • Joule 

    • Could 

    • Ohm

    Correct Answer
    A. Joule/Coulmb
    Explanation
    The correct unit for Potential Difference or Voltage is Joule/Coulomb. This unit represents the amount of work done (measured in Joules) in moving a unit of electric charge (measured in Coulombs) between two points in an electric circuit. It quantifies the energy transfer that occurs when electric charges move from a higher potential to a lower potential. The unit Ohm represents electrical resistance, while Joule and Coulomb are units of energy and charge respectively.

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  • 3. 

    Choose the correct relationship from the following:

    • H=VIT (wherevH= heat ,I= current ,V= potential Differece,T= time)

    • H= VI/T

    • H=IT/V

    • H= VT/I

    Correct Answer
    A. H=VIT (wherevH= heat ,I= current ,V= potential Differece,T= time)
    Explanation
    The correct relationship is H = VIT, where H represents heat, I represents current, V represents potential difference, and T represents time. This equation is derived from the formula for calculating heat, which states that heat is equal to the product of current, potential difference, and time.

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  • 4. 

    Choose the correct statement:

    • Resistance is independent of temprature 

    • Resistance is directly propotional to temprature

    • Resistance is inversly proportional to temprature 

    • Resistivity is independent of temprature 

    Correct Answer
    A. Resistance is directly propotional to temprature
  • 5. 

    A given wire has resistance R, now it's length is doubled while area gets halved then the new resistance of the wire will be 

    • Four times increases 

    • Four times decreases 

    • Two times increases 

    • No change in resistance at all

    Correct Answer
    A. Four times increases 
    Explanation
    When the length of a wire is doubled, its resistance also doubles according to the formula R = ρL/A, where R is resistance, ρ is resistivity, L is length, and A is area. When the area of the wire is halved, the resistance becomes four times its original value. Therefore, the new resistance of the wire will be four times higher than its original resistance.

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  • 6. 

    Charge on a body is a:

    • Scalar quantity 

    • Vector quantity 

    • Can't say anything

    • Tensor (both scalar and vector )

    Correct Answer
    A. Scalar quantity 
    Explanation
    Charge on a body is a scalar quantity because it only has magnitude and no direction. Scalar quantities are described by a single value or number, without any associated direction. In the case of charge, it can be positive or negative, but it does not have a specific direction in space. Therefore, it is considered a scalar quantity.

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  • 7. 

    Choose the correct statement:

    • Direction of current is that in which electrons are moving 

    • Direction of current is from Negative terminal of battery to positive terminal of battery 

    • Direction of current is taken opposite to direction in which electrons are moving 

    • None of the above are correct

    Correct Answer
    A. Direction of current is taken opposite to direction in which electrons are moving 
    Explanation
    The correct statement is that the direction of current is taken opposite to the direction in which electrons are moving. This is because historically, when the concept of electric current was first introduced, it was not known that electrons were the actual charge carriers. Instead, it was believed that positive charges were moving. Therefore, the convention was established to consider the direction of current opposite to the actual movement of electrons. This convention is still followed today, even though we now know that electrons are the ones that carry the charge.

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  • 8. 

    The slope of Current versus Voltage graph tells us about:

    • Resistance 

    • Resistivity 

    • Reciprocal of resistance (1/R)

    • Heat produced 

    Correct Answer
    A. Reciprocal of resistance (1/R)
    Explanation
    The slope of the Current versus Voltage graph represents the ratio of the change in current to the change in voltage. In other words, it indicates how much the current changes for a given change in voltage. Since resistance is defined as the ratio of voltage to current (R = V/I), the reciprocal of resistance (1/R) is equal to the slope of the graph. Therefore, the slope of the Current versus Voltage graph tells us about the reciprocal of resistance (1/R).

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  • 9. 

    A wire of resistance R, if it's length is doubles how does the Resistivity of the wire changes 

    • Resistivity increases two times 

    • Resistivity decreases two times 

    • Resistivity increase by four times 

    • No change in Resistivity at all

    Correct Answer
    A. No change in Resistivity at all
    Explanation
    When the length of a wire doubles, the resistance of the wire also doubles. However, resistivity is an intrinsic property of the material and is independent of the dimensions of the wire. Resistivity is given by the formula ρ = R(A/L), where R is the resistance, A is the cross-sectional area, and L is the length of the wire. As the length doubles, the resistance doubles, but the cross-sectional area also doubles proportionally, resulting in no change in resistivity. Therefore, the correct answer is "No change in resistivity at all."

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  • Mar 21, 2023
    Quiz Edited by
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  • Jun 07, 2020
    Quiz Created by
    Crazy Science
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