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# Magnetic Effect Of Electric Current - MCQ Test (22-11-2017)

## 30 Questions MCQ Test | Magnetic Effect Of Electric Current - MCQ Test (22-11-2017)

Description
This mock test of Magnetic Effect Of Electric Current - MCQ Test (22-11-2017) for Class 10 helps you for every Class 10 entrance exam. This contains 30 Multiple Choice Questions for Class 10 Magnetic Effect Of Electric Current - MCQ Test (22-11-2017) (mcq) to study with solutions a complete question bank. The solved questions answers in this Magnetic Effect Of Electric Current - MCQ Test (22-11-2017) quiz give you a good mix of easy questions and tough questions. Class 10 students definitely take this Magnetic Effect Of Electric Current - MCQ Test (22-11-2017) exercise for a better result in the exam. You can find other Magnetic Effect Of Electric Current - MCQ Test (22-11-2017) extra questions, long questions & short questions for Class 10 on EduRev as well by searching above.
QUESTION: 1

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QUESTION: 2

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QUESTION: 3

### A commutator changes the direction of current in the coil of

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QUESTION: 4

The magnetic field at a point due to current carrying conductor is directly proportional to

A. Current flowing through the conductor
B. Distance of the conductor
C. Resistance of the conductor
D. None of the above

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QUESTION: 5

Which of the following organs in the human body where the magnetic field produced is significant?

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QUESTION: 6

What are the constituents of Alnico?

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QUESTION: 7

The magnetic field lines due to straight wire carrying a current are-

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QUESTION: 8

Which of the following is incorrect?

A. Another name of field lines is lines of space
B. Neutral wire is always at zero potential
C. Heat loss in DC is less than AC
D. Electric fuse is a current generating device

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QUESTION: 9

‘An electric current always produces a magnetic field’ , The above statement is

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QUESTION: 10

Who first detected the presence of magnetic field in earth?

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QUESTION: 11

The power of an electric motor can be increased by

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QUESTION: 12

Which of following statement is not correct about electric fuse

A. It is always connected in live wire
B. It is always connected in the end of the circuit
C. Thinner the fuse wire, greater is its current capacity
D. Its current capacity must be less than the maximum current

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QUESTION: 13

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QUESTION: 14

An electric fuse can prevent accidents arising from-

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QUESTION: 15

What capacity of fuse wire is to be used for geyser

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QUESTION: 16

When the main switch of the house circuit is put off, it disconnects the

A. Live wire
B. Neutral wire
C. Earth wire
D. None of the above

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QUESTION: 17

Find the incorrect statement

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QUESTION: 18

Which of the following describes the common domestic power supplied in India

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QUESTION: 19

A coil of copper wire is connected to a galvanometer. What would happen if a bar magnet is pushed into the coil with its north pole entering first

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QUESTION: 20

A. Steel
B. Alnico
C. Nipermag
D. Tungsten

Solution:

Magnets are made from magnetic metals – iron, nickel and cobalt. These are the only pure metals that can be turned into a permanent magnetSteel is an alloy of iron and so can also be made into a magnetAlnico and Nipermag alloys are ferromagnetic, with a high coercivity (resistance to loss of magnetism) and are used to make permanent magnets

QUESTION: 21

By right – hand thumb rule for current carrying wire the thumb point toward the

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QUESTION: 22

Give names of two materials with which permanent magnets are made

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QUESTION: 23

The phenomena of electromagnetic induction is

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QUESTION: 24

Which one of the following is correct-

A. Fuse wire is an alloy of tin and lead
B. Switch is always connected to live wire
C. Alternate current is unidirectional
D. Higher is the value of current flow, weaker is the magnetic field

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QUESTION: 25

The magnetic field lines inside a long current-carrying solenoid are nearly-

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QUESTION: 26

When a coil carries current in an anti clockwise direction what pole does it create?

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QUESTION: 27

The device used for producing current is called

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QUESTION: 28

Magnetic field lines determine

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QUESTION: 29

What are the factors affecting the strength of magnetic field at a point due to a straight conductor carrying current?

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QUESTION: 30

Why does short circuit lead to the fuse wire burning?

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