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CBSE - Class 10 Science Magnetic Effects of Electric Current Worksheet

1.
State whether the following statements are true or false. (b) A wire with a green insulation is usually the live wire of an electric supply.
2.
State whether the following statements are true or false. (a) The field at the centre of a long circular coil carrying current will be parallel straight lines.
3.
State the rule to determine the direction of a (iii) current induced in a coil due to its rotation in a magnetic field.
4.
State the rule to determine the direction of a (ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it,
5.
State the rule to determine the direction of a (i) magnetic field produced around a straight conductor-carrying current,
6.
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?
7.
When is the force experienced by a current–carrying conductor placed in a magnetic field largest?
8.
List two methods of producing magnetic fields.
9.

Which of the following statement is not correct about the magnetic field?

a.

 (A) Magnetic field lines form a continuous closed curve.

 b.

(B) Magnetic field line do not interest each other

 c.

(C) Direction of tangent at any point on the magnetic field line curve gives the direction of magnetic
field at that point,

 d.

(D) Outside the magnet, magnetic field li nes go from South to North pole of the magnet.
10.
At the time of short circuit, the current in the circuit
a. reduces substantially. b. does not change. c. increases heavily. d. vary continuously.
11.
What is the function of an earth wire? Why is it necessary to earth metallic appliances?
12.
Which of the following correctly describes the magnetic field near a long straight wire?
a. The field consists of straight lines perpendicular to the wire. b. The field consists of straight lines parallel to the wire. c. The field consists of radial lines originating from the wire. d. The field consists of concentric circles centred on the wire.
13.
When does an electric short circuit occur?

Worksheet Answers

9.
Option D
10.
12.
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