MEDIUM
10th CBSE
IMPORTANT
Earn 100
What does the direction of thumb indicate in the right hand thumb rule. In what way this rule is different from Fleming's left hand rule?
Important Questions on Magnetic Effects of Electric Current
EASY
10th CBSE
IMPORTANT
Meena draws magnetic field lines of field close to the axis of a current-carrying circular loop. As she moves away from the centre of the circular loop she observes that the line keep on diverging. How will you explain her observation?
EASY
10th CBSE
IMPORTANT
What does the divergence of magnetic field lines near the ends of a current-carrying straight solenoid indicate?
EASY
10th CBSE
IMPORTANT
Name four appliances wherein an electric motor, a rotating device that converts electrical energy to mechanical energy, is used as an important component. In what respect motors are different from generators?
EASY
10th CBSE
IMPORTANT
What is the role of the two conducting stationary brushes in a simple electric motor?
MEDIUM
10th CBSE
IMPORTANT
What is the difference between a direct current and an alternating current? How many times does AC used in India change direction in one second?
EASY
10th CBSE
IMPORTANT
What is the role of fuse, used in series with any electrical appliance? Why should a fuse with defined rating not be replaced by one with a large rating?
MEDIUM
10th CBSE
IMPORTANT
Why does a magnetic compass needle pointing north and south in the absence of a nearby magnet get deflected when a bar magnet or a current-carrying loop is brought near it. Describe some salient features of magnetic lines of field concept.
MEDIUM
10th CBSE
IMPORTANT
With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current-carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?
