Free Printable ELECTRIC CURRENT AND ITS EFFECT-4

1.

Draw the circuit diagram to represent the circuit shown below.

a)

b)

c)

2.

The bulb in the circuit shown in Fig. does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.

a)

b)

c)

3.

Zubeda made an electric circuit using a cell holder shown in Fig., a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit what is the 1 possible defect .

a)

The two cells may not be connected properly. The negative terminal of one cell should be connected with the positive terminal of the other cell.

b)

Rubber band used may not be tight enough to hold the metal strips tightly. It is necessary that the rubber bands hold the metal strips tightly.

c)

The two cells may not be in proper contact. Current will not flow if circuit is not complete.

4.

Zubeda made an electric circuit using a cell holder shown in Fig., a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit. what is the 2 possible defect

a)

The two cells may not be in proper contact. Current will not flow if circuit is not complete.

b)

The bulb may be fused. Fuse bulb do not complete the circuit. Hence bulb will not glow.

c)

The two cells may not be connected properly. The negative terminal of one cell should be connected with the positive terminal of the other cell.

5.

Zubeda made an electric circuit using a cell holder shown in Fig., a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.what is the 3 possible defect

a)

It is necessary that the rubber bands hold the metal strips tightly.

b)

The negative terminal of one cell should be connected with the positive terminal of the other cell

c)

The two cells may not be in proper contact. Current will not flow if circuit is not complete.

6.

Zubeda made an electric circuit using a cell holder shown in Fig., a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit. what is the 4 possible defect

a)

The bulb may be fused. Fuse bulb do not complete the circuit. Hence bulb will not glow.

b)

The two cells may not be connected properly.

c)

Current will not flow if circuit is not complete.

7.

Write an experiment to show the magnetic effect of current. what is the 1 sentance

a)

Take the cardboard tray from inside a discarded matchbox.

b)

Wrap an electric wire a few times around the cardboard tray

c)

Place a small compass needle inside it.

d)

Now connect the free ends of this wire to an electric cell through a switch.

8.

Write an experiment to show the magnetic effect of current. what is the 2 sentance

a)

Wrap an electric wire a few times around the cardboard tray.

b)

Place a small compass needle inside it.

c)

Now connect the free ends of this wire to an electric cell through a switch.

9.

. Write an experiment to show the magnetic effect of current. what is the 3 sentance

a)

cardboard tray Place a small compass needle inside it Now connect the free

b)

when electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of the electric current.

c)

Place a small compass needle inside it.

10.

Write an experiment to show the magnetic effect of current. what is the 4 sentance

a)

when electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of the electric current.

b)

Now connect the free ends of this wire to an electric cell through a switch.

c)

We will observe that compass needle gets deflected when the current flows in a nearby wire.

11.

Write an experiment to show the magnetic effect of current. what is the 5 sentance

a)

Now, move the switch to the ‘ON’ position.

b)

cardboard tray from inside a discarded matchbox. Wrap an electric wire a few times around the cardboard tray.

c)

current passes through a wire

12.

Write an experiment to show the magnetic effect of current. what is the 6 sentance

a)

it behaves like a magnet.

b)

Place a small compass needle inside it. Now connect the free ends of this wire to an electric cell through a switch.

c)

We will observe that compass needle gets deflected when the current flows in a nearby wire

13.

Write an experiment to show the magnetic effect of current. what is the 7 sentance

a)

Place a small compass needle inside it. Now connect the free ends of this wire to an electric cell through a switch. Now, move the switch to the ‘ON’ position. We will observe that compass needle gets deflected when the current flows in a nearby wire.

b)

electric current passes through a wire, it behaves like a magnet.

c)

So, when electric current passes through a wire, it behaves like a magnet.

14.

Write an experiment to make an electromagnet. what is the 1 sentance

a)

Take around 75 cm long piece of insulated (plastic or cloth covered or enamelled) flexible wire and an iron nail, say about 6–10 cm long.

b)

Wind the wire tightly around the nail in the form of a coil.

c)

Connect the free ends of the wire to the terminals of a cell through a switch.

15.

Write an experiment to make an electromagnet. what is thw 2 sentance

a)

Place some pins on or near the end of the nail. Now switch on the current.

b)

Connect the free ends of the wire to the terminals of a cell through a switch.

c)

Wind the wire tightly around the nail in the form of a coil.

16.

Write an experiment to make an electromagnet. what is the 3 sentance

a)

75 cm long piece of insulated (plastic or cloth covered or enamelled) flexible wire and an iron nail,

b)

say about 6–10 cm long. Wind the wire tightly around the nail in the form of a coil. Connect the free ends of the wire to the terminals

c)

Now switch on the current.

d)

Connect the free ends of the wire to the terminals of a cell through a switch.

17.

Write an experiment to make an electromagnet. what is the 4 sentance

a)

Place some pins on or near the end of the nail.

b)

wire tightly around the nail in the form of a coil. Connect the free ends of the wire to the terminals of a cell through a switch.

c)

coil in the above activity behaves like a magnet when electric current flows

18.

Write an experiment to make an electromagnet. what is the 5 sentance

a)

The pins cling to the end of the nail. The coil in the above activity behaves like a magnet when electric current flows

b)

the coil generally loses its magnetism.

c)

Now switch on the current

19.

Write an experiment to make an electromagnet. what is the 6 sentance

a)

around 75 cm long piece of insulated (plastic or cloth covered or enamelled) flexible wire and an iron nail, say about 6–10 cm long. Wind the wire tightly

b)

electric current is switched off, the coil generally loses its magnetism

c)

The coil in the above activity behaves like a magnet when electric current flows through it.

d)

The pins cling to the end of the nail.

20.

Write an experiment to make an electromagnet. what is the 7 sentance

a)

The coil in the above activity behaves like a magnet when electric current flows through it.

b)

the electric current is switched off,

ELECTRIC CURRENT AND ITS EFFECT-4

Total questions: 20

Worksheet time: 10mins

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