Quiz on math game

This is a timed quiz. You will be given 120 seconds to answer all questions. Are you ready?

120

0%

According to Joule law heat produced by a current I while in flowing through a material of resistance R for a length of time T, is proportional to

(I2RT)

T only

(IRT)

none

Correct! Wrong!

In the color code white color represents the number

8

7

none

Correct! Wrong!

The unit of conductivity is

mho / sq. m

mho / m

ohm / m

none

Correct! Wrong!

If the resistance of an incandescent light bulb changes as the voltage across the bulb is changed, which of the following is true ?

The bulb is said to have a low ionization potential B. The bulb is a type of non-linear resistance..

The bulb is a type of non-linear

The internal inductance of the bulb causes this change

The bulb is said to have a low ionization potential

Correct! Wrong!

In the color code for resistances black color represents the number

2

1

0

none

Correct! Wrong!

In the color code number 3 is represented by

blue

orange

white

none

Correct! Wrong!

The condition for the validity under Ohm's law is

Resistance must be uniform

Resistance must be wire wound type

Current should be proportional to the size of resistance

none

Correct! Wrong!

Ohm's law is not applicable in all the following cases except

Arc lamps

Electrolysis

Vacuum radio valves

Insulators

Correct! Wrong!

Quiz on math game

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