EASY
10th CBSE
IMPORTANT
Earn 100

In the statement of Fleming's left-hand rule, what do the following represent : 

(i) the direction of the forefinger.

(ii) the direction of the middle finger.

(iii) the direction of the thumb.

Important Questions on Magnetic Effects of Electric Current

MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 3
If number of coils of many turns are used in a motor, it is found that the motion of the coil is not smooth but jerky. Why is it so? How can this jerky motion be converted into a smooth circular motion?
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 4
State four factors which determine the power of an electric motor.
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 5
A commutator is sometimes called split ring. Explain.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 5
State the energy changes which take place in an electric motor.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 6
Why is the household wiring done in parallel? Give at least two reasons.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 6
What are the disadvantages of wiring a household circuit in series?
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 7

An electron enters a magnetic field at right angles to the field direction as shown in the figure. State the rule to find the direction of force acting on the electron.

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MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 4 - Magnetic Effects of Electric Current>EXERCISE - 4B>Q 7

An electron enters a magnetic field at right angles to the field direction as shown in the figure. What will be the direction of force acting on the electron?

 

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