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Electric Current & Its Effects Mock Tests

19 questions available

Electric Current & Its Effects Mock Test 1

Questions: 19

नमूना प्रश्न

Class 7 Science
When electric current flows through a wire, a nearby compass needle deflects. This shows that electric current produces a:
A Magnetic effect
B Heating effect
C Chemical effect
D Lighting effect
Class 7 Science
An electromagnet is used in which of the following devices?
A Electric bell
B Electric bulb
C Electric heater
D Iron
Class 7 Science
Which direction does the compass needle point towards when the circuit is switched ON?
A East
B West
C North
D South
Class 7 Science
A compass needle is made of which material?
A Wood
B Plastic
C Magnet
D Copper
Class 7 Science
When a compass is placed near a current-carrying wire, the compass needle:
A Disappears
B Deflects from its north-south direction
C Becomes hotter
D Turns red
Class 7 Science
An electromagnet is used in which of the following?
A Thermometer
B Electric bell
C Barometer
D Hygrometer
Class 7 Science
In an electric circuit, when electric current flows through a wire, the wire becomes:
A Colder
B Magnetically heated
C Warmer due to heating effect
D Glowing without any heat
Class 7 Science
An electromagnet can be turned ON and OFF by controlling:
A Electric current
B Magnetic field strength
C The type of metal
D The size of the coil

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