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NEET UG Current Electricity — practice questions — page 5

Explore 163 free Current Electricity questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Current Electricity questions and exercises with answers

Showing questions 121–150 of 163.

If two identical slabs are joined end to end, the combined resistance is:Read the answer and worked solution →Match the current termRead the answer and worked solution →Raises or lowers resistance?Read the answer and worked solution →True or false about current electricityRead the answer and worked solution →Current electricity numbersRead the answer and worked solution →Complete Ohm's lawRead the answer and worked solution →What happens to resistance?Read the answer and worked solution →Tap what affects resistanceRead the answer and worked solution →Current electricity bingoRead the answer and worked solution →Which material can show more than one voltage for the same current, so its V-I relation is not unique?Read the answer and worked solution →A mobility of 1 m^2/(V s) equals how many cm^2/(V s)?Read the answer and worked solution →Why are manganin and constantan used in standard resistors?Read the answer and worked solution →Why does a semiconductor's resistivity fall on heating?Read the answer and worked solution →Heating copper raises its resistivity mainly through which change?Read the answer and worked solution →Metals typically have resistivities in which range?Read the answer and worked solution →What does Ohm's law actually assert about a conductor?Read the answer and worked solution →Materials that carry current when a field is applied are:Read the answer and worked solution →If two identical slabs are joined end to end, the combined resistance is:Read the answer and worked solution →What happens to resistance?Read the answer and worked solution →Match the current termRead the answer and worked solution →Raises or lowers resistance?Read the answer and worked solution →True or false about current electricityRead the answer and worked solution →Current electricity bingoRead the answer and worked solution →An electric current is constituted by:Read the answer and worked solution →Ohm's law states that V is proportional to:Read the answer and worked solution →Doubling the length of a conductor makes its resistance:Read the answer and worked solution →Resistance is inversely proportional to the conductor's:Read the answer and worked solution →The average time between electron collisions is called:Read the answer and worked solution →The drift velocity of electrons points:Read the answer and worked solution →Drift velocity is small compared with the electrons':Read the answer and worked solution →

Worked practice questions

If two identical slabs are joined end to end, the combined resistance is:

  1. Half of R
  2. Same as R
  3. Four of R
  4. Twice R
Show answer and solution

Correct answer: D. Twice R

1. Joining end to end doubles the length of the path. 2. Doubling the length doubles the resistance. 3. So the combination has twice the resistance. 4. The answer is twice R. _Source: syllabus Physics, Ch 3 'Current Electricity'_

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Match the current term

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Matching pairs
  1. Left
    Electric current
    Right
    Charges that are in motion
  2. Left
    Conductor
    Right
    Carries current in a field
  3. Left
    Ohm
    Right
    The SI unit of resistance
Instructions
Match each term to what it means.
_Source: syllabus Physics, Ch 3 'Current Electricity'_

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Raises or lowers resistance?

Read exercise and reference answers
Left
Raises
Items
  1. Item
    Longer wire
    Answer
    Raises
  2. Item
    Thinner wire
    Answer
    Raises
  3. Item
    Smaller area
    Answer
    Raises
  4. Item
    Shorter wire
    Answer
    Lowers
  5. Item
    Thicker wire
    Answer
    Lowers
  6. Item
    Bigger area
    Answer
    Lowers
Right
Lowers
Instructions
Swipe left if it raises resistance, right if it lowers it.
_Source: syllabus Physics, Ch 3 'Current Electricity'_

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