Current Electricity Test

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Current Electricity Test - 32

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Weekly Quiz Competition

Question 1
1 / -0

Carbon resistors are of two types :

A
composition type resistor and film type resistor

B
rheostat and film type resistor

C
rheostat and variable resistor

D
composition type resistor and rheostat

Solution

Carbon resistors are of two types composition type resistor and film type resistor.

There are a number of different types of fixed resistor:

Carbon composition: These types were once very common, but are now seldom used.

Carbon film: This resistor type is formed by "cracking" a hydrocarbon onto a ceramic former.
Question 2
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Which resistor is difficult to make of having a value less than about 2 Ohms?

A
Iron Resistor

B
Carbon Resistor

C
Wire wound Resistor

D
Both b and c

Solution

Carbon resistor is difficult to make of having a value less than about $$20 $$Ohms because they have ability to withstand high energy pulses, when current flow through the carbon composition body conducts the energy . So carbon resistor can be made with a higher resistance
Question 3
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The wire wound resistor is also known as :

A
variable resistor

B
rheostat

C
circular coil

D
Both a and b

Solution

it is rheostat
Question 4
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Which resistor has color bands on it?

A
Carbon resistor

B
Rheostat

C
Wire wound resistor

D
None of these

Solution

The carbon composition resistor is a type of fixed resistor that reduces or restricts the electric current flow to a certain level.
Question 5
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Green,blue ,brown,gold are the color bands on resistors.Find its resistance?

A
$$580\Omega$$

B
$$560\Omega$$

C
$$480\Omega$$

D
$$58\Omega$$

Solution

first digit=green=5
Second digit=blue=6
3rd color=brown=multiplier=10
4th=gold=tolerance=5%
therefore,
$$R=56\times 10 $$ with 5% tolerance
$$R=560\Omega$$ with 5% Tolerance
Question 6
1 / -0

White,gray,brown and gold are the color bands on resistors.Find its resistance?

A
$$98\Omega$$

B
$$950\Omega$$

C
$$9.8\Omega$$

D
$$9800\Omega$$

Solution

white=1st digit=9
Grey=2nd digit=8
Brown=multiplier=10
gold=tolerance=5%
$$R=95\times 10 \Omega$$ and 5% tolerance
$$R=950\Omega$$
Question 7
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Your are given three equal resistances. In how many combinations can they be arranged?

A
Three

B
Four

C
Five

D
Two

Solution

Three equal resistances can be connected in four different combinations:
1) All three in parallel.
2) Two in parallel and third in series.
3) Two in series and third in parallel of both.
4) All three in series.
Question 8
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Which of the following component is connected in parallel in the circuit?

A
Rheostat

B
Capacitor

C
Bulb

D
LED

Solution

Since the current in both bulbs is not same but they have same potential so they are connected in parallel.
Therefore, C is correct statement.
Question 9
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Which of the following is not a correct statement with respect to the given circuit?

A
Switch $$S$$ is closed

B
Current is flowing in the circuit

C
$$B$$ and $$C$$ are connected in series

D
$$A$$ is connected in series to $$B$$ and $$C$$
Question 10
1 / -0

Which color band in the resistor is having highest tolerance?

A
Violet

B
Green

C
Blue

D
None of the above

Solution

Tolerance level of
Green:$$0.5\%$$
Blue:$$0.25\%$$
Violet:$$0.1\%$$
Hence green is having highest tolerance.