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Free CBSE Class 10 Science Unit IV: Effects of Current Electricity Worksheets

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Sample CBSE Class 10 Science Unit IV: Effects of Current Electricity Worksheet Questions

1.

A current of 1 A is drawn by a filament of an electric bulb. Number
of electrons passing through a cross section of the filament in 16
seconds would be roughly

1.

1020

2.

1016

3.

1018

4.

1023

2.

on which of the following no"plus" or "minus" sign is marked?

1.

a cell

2.

an ammeter 

3.

a voltmeter

4.

a resistor

3.

consider the following incomplete statement "ohm's law relates potential difference with......for a given resistance".the suitable choice for the missing word is 

1.

power

2.

enegy

3.

current 

4.

time 

4.

the current in a wire depends 

1.

only on the potential difference applied 

2.

only on the resistance of the wire 

3.

on both of them 

4.

on none of them

5.

in a metal,

1.

all the electrons are free to move 

2.

all the electrons are bound to their parent atoms 

3.

there are no electrons 

4.

some electrons are free to move

6.

the free electrons of a metal are free to 

1.

move on the surface only

2.

are free to escape through the surface

3.

are free to fall into  the nuclei

4.

are free to move anywhere in the metal 

7.

an ammeter is always connected in ........ and a voltmeter in ....... . the suitable words, in order, for the blanks are 

1.

series, series 

2.

parallel, parallel

3.

parallel, series 

4.

series, parallel

8.

Joule/Coulomb is the same as 

1.

watt

2.

volt

3.

ampere

4.

ohm

9.

A charge is taken from a point A to a point B. The work done per unit charge in this process is called 

1.

the potential at point A

2.

the potential at point B

3.

the potential difference between B and A

4.

the current from A and B

10.

The potential at a point is 20V. The work done in bringing a charge of 0.5C From infinity to this point will be 

1.

20J

2.

10J

3.

5J

4.

40J

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