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Class 10 Science Chapter Magnetic Effects of Electric Current - Part 4

Class 10 Science Chapter Magnetic Effects of Electric Current

Class 10th
35 Questions
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Q1 • MCQ • 1 marks
The domestic electric supply in India is:
Q3 • MCQ • 1 marks
The frequency of household AC in India is:
Q4 • MCQ • 1 marks
One complete AC cycle at 50 Hz takes:
Q5 • MCQ • 1 marks
A transformer changes:
Q6 • MCQ • 1 marks
In an electric motor, the coil rotates because:
Q7 • MCQ • 1 marks
Which transformer is used at power stations to reduce transmission losses?
Q8 • MCQ • 1 marks
Near consumers, electricity is supplied through a:
Q9 • MCQ • 1 marks
Which device cannot operate directly on DC for voltage transformation?
Q10 • MCQ • 1 marks
The magnetic field around a straight conductor is in the form of:
Q11 • MCQ • 1 marks
Which rule helps determine the direction of magnetic field around a straight conductor?
Q12 • MCQ • 1 marks
The magnetic field at the center of a circular current-carrying loop is:
Q13 • MCQ • 1 marks
Increasing the number of turns in a circular coil will:
Q14 • MCQ • 1 marks
Magnetic field lines around a magnet:
Q15 • MCQ • 1 marks
Magnetic field lines are closest near the:
Q16 • MCQ • 1 marks
The strength of a magnetic field is represented by:
Q17 • MCQ • 1 marks
A freely suspended compass needle aligns itself along the:
Q18 • MCQ • 1 marks
Which device works on the principle of force on a current-carrying conductor?
Q19 • MCQ • 1 marks
Which device works on electromagnetic induction?
Q20 • MCQ • 1 marks
AC generator produces:
Q21 • MCQ • 1 marks
Which of the following is NOT an application of an electromagnet?
Q22 • MCQ • 1 marks
Which material is attracted most strongly by a magnet?
Q23 • MCQ • 1 marks
Which pole of a magnet points toward the geographic north when suspended freely?
Q24 • MCQ • 1 marks
If the direction of current through a solenoid is reversed, its:
Q25 • MCQ • 1 marks
The magnetic effect of electric current is widely used in:
Q26 • MCQ • 1 marks
Which of the following devices contains a split-ring commutator?
Q27 • MCQ • 1 marks
Which of the following devices generally uses slip rings instead of split rings?
Q28 • MCQ • 1 marks
The purpose of slip rings in an AC generator is to:
Q29 • MCQ • 1 marks
The split ring in a DC motor is made of:
Q30 • MCQ • 1 marks
A transformer works only with:
Q31 • MCQ • 1 marks
The phenomenon of magnetic effect of current was discovered by:
Q32 • MCQ • 1 marks
Direction of induced current given by:
Q33 • MCQ • 1 marks
Generator converts:
Q34 • MCQ • 1 marks
The magnetic field inside a long solenoid is similar to that of a:
Q35 • MCQ • 1 marks
The core of a transformer is usually made of:
Q36 • MCQ • 1 marks
Which device converts mechanical energy into electrical energy?

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