Electric current and its effects

1.

Multiple Choice

30 sec

1 pt

Who discovered the magnetic field of electric current?

Hans Christin Oyster

James Kristin Oersted

Lans Christin Oestred

Hans Christian Oersted

2.

Multiple Choice

30 sec

1 pt

Where can the key or switch be placed in the circuit?

The left side of the battery

The right side of the battery

Can be placed anywhere in the circuit

Near the positive terminal of the bulb

3.

Multiple Choice

30 sec

1 pt

The amount of heat produced in a wire depends on

material

length

thickness

all of these

4.

Multiple Choice

30 sec

1 pt

When an electric current flows through a copper wire AB as shown in Figure, the wire:

deflects a magnetic needle placed near it

becomes red hot

gives electric shock

behaves like a fuse

5.

Multiple Choice

30 sec

1 pt

The coil of wire contained in an electric heater is known as

component

element

circuit

spring

6.

Multiple Choice

30 sec

1 pt

Which one of the following is based on the heating effect of current?

Geyser

Hair-dryer

Electric Kettle

All of the options

7.

Multiple Choice

30 sec

1 pt

In making a battery

(a) the positive terminal of one cell is connected to the negative terminal of the next cell

(b) the positive terminal of one cell is connected to the positive terminal of the next cell

(c) the negative terminal of one cell is connected to the negative terminal of the next cell

(d) none of the above

a

b

c

d

8.

Multiple Choice

30 sec

1 pt

A battery is a combination of

(a) only single cell

(b) only two cells

(c) two or more cells

(d) None of the above

a

b

c

d

9.

Multiple Select

30 sec

1 pt

Our body is a ……………… of electricity.

Good Conductor

Bad Conductor

Bad Insulator

Good Insulator

10.

Multiple Choice

30 sec

1 pt

When the switch is on the circuit from the positive to negative terminal is complete

True

False

11.

Multiple Choice

30 sec

1 pt

Wires made from some special materials melt quickly and break when a large electric current passes through it.these wires are used to make

Fuses

Electric fuses

A&B

Electromagnet

12.

Multiple Choice

30 sec

1 pt

·Who was the first person to notice the deflection of compass needle everytime the current passes through the wire.

Hans Christian Andersen

Hans Christian oersted

Hans Christian mandorson

None of the above

13.

Multiple Choice

30 sec

1 pt

When an electric current flows through the wire it gets heated it is known as the heater

True

False

14.

Multiple Choice

30 sec

1 pt

Electromagnets could be used in particular devices

TRUE

FALSE

15.

Multiple Choice

30 sec

1 pt

When does an electromagnet lose its magnetic Property?

When current is very high

When its switched off

When heat is very high

When current is switched on

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