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Magnetic Effects of Electric Current Science - Magnetic Effects of Electric Current

CBSE - STD 10 - Science (CBSE - English Medium). 478 questions in this chapter.

Question types

Magnetic Effects of Electric Current question types

478 questions across 12 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

478
Questions
12
Question groups
5
Question types
Sample Questions

Magnetic Effects of Electric Current questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q1 Mark
When the switch S is closed in the figure given below, the pointer of the galvanometer moves to the right.
If S is kept closed, will the pointer:
  • ✓
    Return to zero?
  • B
    Stay over on the right?
  • C
    Move to the left and stay there.
  • D
    Move to and fro until S is opened.

Answer: A.

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Q 2M.C.Q1 Mark
Which of the following statements is incorrect regarding magnetic field lines?
  • A
    The direction of magnetic field at a point is taken to be the direction in which the north pole a magnetic compass needle points.
  • B
    Magnetic field lines are closed curves.
  • ✓
    If magnetic field lines are parallel and equidistant, they represent zero field strength.
  • D
    Relative strength of magnetic field is shown by the degree of closeness of the field lines.

Answer: C.

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Q 3M.C.Q1 Mark
The back face of a circular loop of wire is found to be south magnetic pole. The direction of current in this face of the circular loop of wire will be:
  • A
    Towards south.
  • ✓
    Clockwise.
  • C
    Anticlockwise.
  • D
    Towards north.

Answer: B.

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Q 4M.C.Q1 Mark
The strength of the magnetic field between the poles of an electromagnet would be unchanged if:
  • A
    Current in the electromagnet winding were doubled.
  • ✓
    Direction of current in electromagnet winding were reversed.
  • C
    Distance between the poles of electromagnet were doubled.
  • D
    Material of the core of electromagnet were changed.

Answer: B.

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Q 5M.C.Q1 Mark
The axis of earth's magnetic field is inclined with the geographical axis at an angle of about:
  • A
    5°
  • ✓
    15°
  • C
    25°
  • D
    30°

Answer: B.

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Q 6Fill in the blank1 Mark
Fill in the following blanks with suitable words:
If a coil is viewed from one end, and the current flows in a clockwise direction, then this end is a ________.
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Q 10Fill in the blank1 Mark
Fill in the following blanks with suitable words:
If a coil is viewed from one end and the current flows in an anticlockwise direction, then this end is a pole ________.
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Q 11[1 Mark Questions]1 Mark
A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?
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Q 15[1 Mark Questions]1 Mark
Copy the figure given below which shows a plotting compass and a magnet. Label the N pole of the magnet and draw the field line on which the compass lies.
 
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Q 17[2 Mark Questions]2 Marks
In the straight wire A, current is flowing in the vertically downwards direction whereas in wire B the current is flowing in the vertically upward direction. What is the direction of magnetic field:
  1. In wire A?
  2. In wire B?
Name the rule which you have used to get the answer.
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Q 19[2 Mark Questions]2 Marks
A current-carrying straight wire is held in exactly vertical position. If the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it? Name the rule used to find the direction of magnetic field.
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Q 21[3 Mark Questions]3 Marks
Draw a labelled diagram to show the domestic electric wiring from an electric pole to a room. Give the wiring for a bulb and a three-pin socket only.
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Q 23[3 Mark Questions]3 Marks
A coil is connected to a galvanometer. When the N-pole of magnet is pushed into the coil, the galvanometer deflected to the right. What deflection, if any, is observed when:
  1. The N-pole is removed?
  2. The S-pole is inserted?
  3. The magnet is a rest in the coil?
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Q 24[3 Mark Questions]3 Marks
An electric kettle rated as 1200W at 220V and a toaster rated at 1000W at 220V are both connected in parallel to a source of 220V. If the fuse connected to the source blows when the current exceeds 9.0A, can both appliances be used at the same time? Illustrate your answer with calculations.
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Q 25[3 Mark Questions]3 Marks
The direction of current flowing in the coil of an electromagnet at its two ends X and Y are as shown below:
  1. What is the polarity of end X?
  2. What is the polarity of end Y?
  3. Name and state the rule which you have used to determine the polarities.
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Q 31M.C.Q-[Phy-1M]1 Mark
Which one of the following statements is not true?
  1. In a house circuit, lamps are used in parallel.
  2. Switches, fuses and circuit breakers should be placed in the neutral wire.
  3. An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock.
  4. When connecting a three-core cable to a 13 three-pin plug, the red wire goes to the live pin.
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Q 32M.C.Q-[Phy-1M]1 Mark
Which of the following statements is incorrect regarding magnetic field lines?
  1. The direction of magnetic field at a point is taken to be the direction in which the north pole a magnetic compass needle points.
  2. Magnetic field lines are closed curves.
  3. If magnetic field lines are parallel and equidistant, they represent zero field strength.
  4. Relative strength of magnetic field is shown by the degree of closeness of the field lines.
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Q 34M.C.Q-[Phy-1M]1 Mark
Which of the following correctly describes the magnetic field near a long straight wire?
  1. The field consists of straight lines perpendicular to the wire.
  2. The field consists of straight lines parallel to the wire.
  3. The field consists of radial lines originating from the wire.
  4. The field consists of concentric circles centred on the wire.
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Q 35M.C.Q-[Phy-1M]1 Mark
When the switch S is closed in the figure given below, the pointer of the galvanometer moves to the right.

If S is kept closed, will the pointer:
  1. Return to zero?
  2. Stay over on the right?
  3. Move to the left and stay there.
  4. Move to and fro until S is opened.
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Q 51Answer the questions.[Phy-3M]3 Marks
When the magnet shown in the diagram below is moving towards the coil, the galvanometer gives a reading to the right.

  1. What is the name of the effect being produced by the moving magnet?
  2. State what happens to the reading shown on the galvanometer when the magnet is moving away from the coil.
  3. The original experiment is repeated. This time the magnet is moved towards the coil at a great speed. State two changes you would notice in the reading on the galvanometer.
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