Electricity and Magnetism Test

Result

Electricity and Magnetism Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

The rod or stem in a gold leaf electroscope is made up of

A
wood

B
brass

C
glass

D
ebonite

Solution

Brass is the correct option to be chosen. It consists of a vertical metal rod, usually brass, from the end of which hang two parallel strips of thin flexible gold leaf. A disc or ball terminal is attached to the top of the rod, where the charge to be tested is applied.
Question 2
1 / -0

What is the current in a wire through which 20.0 C of charge passes in 4.00 s?

A
2.00 A

B
8.00 A

C
4.00 A

D
5.00 A
Question 3
1 / -0

A conductor carries a current of 0.3 A for 20 s. How many electrons will flow in this time interval if charge on one electron is 1.6 × 10^-19 C?

A
3.75 × 10^-19

B
2.67 × 10^-20

C
3.75 × 10¹⁹Correct Answer.

D
2.67 × 10^-18
Question 4
1 / -0

The current flowing in a conductor of resistance `R` ohm is `I` mpere. What amount of current will be flowing in a conductor, if the resistance of conductor is doubled keeping the potential difference across it the same?

A
2 I

B
4 I

C
I/2

D
I/4
Question 5
1 / -0

On which of the following factors does electrical resistivity of a given metallic wire depend?

A
Length

B
Thickness

C
Shape

D
Nature of the material
Question 6
1 / -0

Electron volt is the unit of

A
energy

B
charge to mass

C
charge

D
potential difference
Question 7
1 / -0

When a fuse is rated 8 A, it means

A
it will not work if current is less than 8 A

B
it has a resistance of 8 ohm

C
it will work only if current is 8 A

D
it will burn, if current exceeds 8 A
Question 8
1 / -0

In a household circuitry, the appliances are connected in

A
series combination

B
parallel combination

C
series parallel combination

D
all of these
Question 9
1 / -0

An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?

A
1 A

B
2 A

C
4 A

D
5 A

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Electricity and Magnetism Test - 3

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Electricity and Magnetism Test - 3

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Question 1

wood

brass

glass

ebonite

Solution

Question 2

2.00 A

8.00 A

4.00 A

5.00 A

Question 3

3.75 × 10-19

2.67 × 10-20

3.75 × 1019Correct Answer.

2.67 × 10-18

Question 4

2 I

4 I

I/2

I/4

Question 5

Length

Thickness

Shape

Nature of the material

Question 6

energy

charge to mass

charge

potential difference

Question 7

it will not work if current is less than 8 A

it has a resistance of 8 ohm

it will work only if current is 8 A

it will burn, if current exceeds 8 A

Question 8

series combination

parallel combination

series parallel combination

all of these

Question 9

1 A

2 A

4 A

5 A

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3.75 × 10^-19

2.67 × 10^-20

3.75 × 10¹⁹Correct Answer.

2.67 × 10^-18