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Andhra Pradesh SSC (Class 10) Effects of Electric Current — practice questions — page 2

Explore 71 free Effects of Electric Current questions in Andhra Pradesh SSC (Class 10) Science and Technology. Open each question or exercise to read its content, reference answers and available explanation.

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Effects of Electric Current questions and exercises with answers

Showing questions 31–60 of 71.

The magnetic field around a STRAIGHT current-carrying conductor:Read the answer and worked solution →The RIGHT-HAND THUMB RULE is used to find:Read the answer and worked solution →A SOLENOID is best described as a:Read the answer and worked solution →FLEMING'S LEFT-HAND RULE relates which three quantities mutually perpendicular?Read the answer and worked solution →An ELECTRIC MOTOR primarily converts:Read the answer and worked solution →The domestic mains supply in India is approximately:Read the answer and worked solution →A FUSE in a domestic electrical circuit:Read the answer and worked solution →Electric current is defined as:Read the answer and worked solution →Ohm's law relates V, I, R as:Read the answer and worked solution →In a series circuit with R1 = 4 Ω and R2 = 6 Ω, total resistance is:Read the answer and worked solution →Joule heating formula gives heat H as:Read the answer and worked solution →The magnetic field around a current-carrying wire was discovered by:Read the answer and worked solution →In the right-hand thumb rule, the thumb represents:Read the answer and worked solution →Force on a current-carrying conductor in a magnetic field equals:Read the answer and worked solution →In Fleming's left-hand rule, the thumb represents:Read the answer and worked solution →Electromagnetic induction was discovered by:Read the answer and worked solution →An AC generator differs from a DC generator by having:Read the answer and worked solution →CLASS10 · Physics · Tap the Electrical UnitsRead the answer and worked solution →CLASS10 · Physics · Ohm's Law — Gap FillRead the answer and worked solution →CLASS10 · Physics · Resistors — Series or ParallelRead the answer and worked solution →CLASS10 · Physics · Magnetic Field RulesRead the answer and worked solution →CLASS10 · Physics · Electric Power FormulasRead the answer and worked solution →CLASS10 · Physics · Magnetic Effect — Quick True/FalseRead the answer and worked solution →Who first demonstrated the link between electricity and magnetism?Read the answer and worked solution →Magnetic field lines around a straight current-carrying wire are:Read the answer and worked solution →Which rule gives the direction of force on a current-carrying conductor in a magnetic field?Read the answer and worked solution →What energy conversion does an electric motor perform?Read the answer and worked solution →In India, the frequency of AC supply is approximately:Read the answer and worked solution →A current-carrying solenoid behaves like which of the following?Read the answer and worked solution →Why is soft iron used as the core of an electromagnet?Read the answer and worked solution →

Worked practice questions

The magnetic field around a STRAIGHT current-carrying conductor:

  1. Forms concentric circles around the wire
  2. Forms straight lines along the wire's length
  3. Is uniform and equal everywhere in space
  4. Points away from the wire in a fixed direction
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Correct answer: A. Forms concentric circles around the wire

A straight current-carrying conductor produces CIRCULAR magnetic field lines in planes perpendicular to the wire. The strength is proportional to current and inversely proportional to distance from the wire.

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The RIGHT-HAND THUMB RULE is used to find:

  1. The angle of refraction when light enters glass
  2. The voltage needed to drive a current in a wire
  3. The direction of magnetic field around a current-carrying wire
  4. The force experienced by a charged particle in a field
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Correct answer: C. The direction of magnetic field around a current-carrying wire

The Right-Hand Thumb Rule: hold the conductor in your right hand with thumb pointing in current direction your curling fingers give the direction of magnetic field lines around the wire.

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A SOLENOID is best described as a:

  1. Single straight current-carrying conductor
  2. Single circular current-carrying loop
  3. Compass needle inside a glass case
  4. Long coil of many insulated wire turns
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Correct answer: D. Long coil of many insulated wire turns

A solenoid is a long coil of many insulated turns of wire. When current flows, the magnetic field inside is uniform the field outside resembles a bar magnet. Inserting a soft iron core makes it an electromagnet.

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