Electricity and Magnetism Test

Result

Electricity and Magnetism Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

A glass rod rubbed with silk is brought near the cap of a negatively charged gold leaf electroscope. The leaf divergence will

A
decrease

B
increase

C
remain unchanged

D
first increase, then decrease

Solution

When glass rod is rubbed with silk,glass rod will acquire positive charge. When positive charge is brought near negatively charge electroscope, repulsion between leaves of electroscope will decrease and thus divergence will decrease.
Question 2
1 / -0

If 18.75 × 10¹⁸ electrons flow through a conductor in 3 seconds, the total charge that flows through the conductor is

A
1 C

B
2 C

C
3 C

D
4 C

Solution

The answer is 18.75 x 10¹⁸ x 1.6 x 10^-19 C = 3 C
Question 3
1 / -0

If the current in a household appliance is 6.00 A, what amount of charge passes through the appliance in 15.0 s?

A
2.5 C

B
90.0 C

C
40.0 C

D
45.0 C
Question 4
1 / -0

There is no flow of current between two charged bodies when connected because

A
they have the same quantity of charge

B
they are at the same potential

C
they have the same capacity

D
they have the same ratio of potential per unit charge
Question 5
1 / -0

A cell is connected to a bulb which develops a potential difference of 16 volts across it. The current in the circuit is measured to be 2 amperes. What is the resistance offered by the filament of the bulb to the flow of current?

A
32 Ω

B
16 Ω

C
2 Ω

D
8 Ω
Question 6
1 / -0

Resistance of a metallic wire of length `l` and area of cross-section `A` is `R`. If the diameter of the wire is doubled, keeping the length unchanged, what will be the new resistance of the wire?

A
R/4

B
2R

C
R/2

D
4R
Question 7
1 / -0

When the main switch of the house circuit is put off, it disconnects the

A
live wire

B
neutral wire

C
earth wire

D
live and neutral wires
Question 8
1 / -0

Tungsten is mainly used for making filaments of electric bulbs because of its

A
low cost

B
high melting point

C
high electrical conductivity

D
low thermal conductivity

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Re-Attempt Weekly Quiz Competition

Electricity and Magnetism Test - 1

Result

Electricity and Magnetism Test - 1

Score

-

Rank

-

SHARING IS CARING

Question 1

decrease

increase

remain unchanged

first increase, then decrease

Solution

Question 2

1 C

2 C

3 C

4 C

Solution

Question 3

2.5 C

90.0 C

40.0 C

45.0 C

Question 4

they have the same quantity of charge

they are at the same potential

they have the same capacity

they have the same ratio of potential per unit charge

Question 5

32 Ω

16 Ω

2 Ω

8 Ω

Question 6

R/4

2R

R/2

4R

Question 7

live wire

neutral wire

earth wire

live and neutral wires

Question 8

low cost

high melting point

high electrical conductivity

low thermal conductivity

User

Question Analysis

My Perfomance

Score

-

Rank

-

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