Electricity

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Electricity and Resistance Quiz

Test your knowledge on electricity and resistance with our engaging quiz! Whether you're a student, teacher, or just an enthusiast, this quiz covers a variety of topics from Ohm's law to the behavior of resistors in different configurations.

What you'll discover:

Key concepts of electrical resistance
Understanding of circuit theory
Practical applications of resistivity and current

15 Questions4 MinutesCreated by LearningWave42

Two wires A and B of equal masses and of the same metals are taken. The diameter of the wire A is half the diameter of the wire B. If the resistance of A is 24 Ω then find the resistance of wire B?

0.5

1.5

If 400 Ω resistance is made by adding four 100 Ω resistance of tolerance 5%, then the tolerance of the combination is

10%

15%

20%

Resistance n, each of r Ω, when connected in parallel give an equivalent resistance of R Ω. If these resistances were connected in series, the combination would have a resistance in Ω, equal to

N^2R

R / n^2

R / n

A cylindrical wire is stretched to increase its length b 10 %. What is the percentage increase in resistance?

10%

41%

21%

A copper wire is stretched to make it 0.2%. What is the percentage change in its resistivity?

0.4%

None of these

A steel wire is stretched to make it 0.2% longer. What is the percentage change in its resistance?

0.4%

0.2%

In a Wheatstone bridge, if the galvanometer shows zero deflection, the unknown resistance will be____ Ω. (Given P = 1000 Ω, Q = 10000 Ω and R = 20 Ω)

2000 ohm

10 ohm

200 ohm

100 ohm

If 6.25 × 1018 electrons flow through a given cross section in unit time, then the current is ____. (charge of an e- is 1.6 × 10-19 C)

10A

3.9A

1mA

If a potential difference of 6 V is applied across a conductor of length 0.12 m, electron mobility is 5.6 x 10-6 m2 V-1 s-1, then the drift velocity of electrons will be ____.

2.8 x 10-4 m s-1

0.28 x 10-4 m s-1

28 x 10-4 m s-1

8.2×10−4ms−1

For driving a current of 3 A for 5 min in an electrical circuit, 900 J of work is to be done. Then the emf of the source in the circuit will be ____

In potentiometer, a balance point is obtained when ____.

The emf of the battery becomes equal to the emf of the experimental cell.

The potential difference of the wire between the positive end of the battery to jockey becomes equal to the emf of the experimental cell.

The potential difference of the wire between the positive point of the cell and the jockey becomes equal to the emf of the battery.

The potential difference across the potentiometer wire becomes equal to the emf of the battery.

If two similar cells are connected first in series, and then in parallel, then the ratio of balancing length in the potentiometer wire will be:

2:1

1:2

1:4

4:1

If in the experiment of Wheatstone bridge, the battery and galvanometer are interchanged, then balance points will ____.

Change

Remain unchanged

Depend on internal resistance of the cell

Depend on the emf of the battery

Electricity

Electricity and Resistance Quiz

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