Current Electricity Test

Result

Current Electricity Test - 150

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

If in the circuit, power dissipation is 150 W, then R is

A
2 Ω

B
6 Ω

C
5 Ω

D
4 Ω

Solution
Question 2
4 / -1

Find the power of the circuit

A
1.5 W

B
2 W

C
1 W

D
None of these

Solution
Question 3
4 / -1

The heat generated through 2 ohm and 8 ohm resistances separately, when a condenser of 200µF capacity charged to 200 V is discharged one by one, will be

A
4 J and 16 J respectively

B
16 J and 4 J respectively

C
4 J and 8 J respectively

D
4 J and 4 J respectively

Solution
Question 4
4 / -1

The heat developed in an electric wire of resistance R by a current I for at time t is

A

B

C

D
Question 5
4 / -1

Two bulbs, one of 50 watt and another of 25 watt are connected in series to the mains. The ratio of the currents through them is

A
2 : 1

B
1 : 2

C
1 : 1

D
Without voltage, cannot be calculated
Question 6
4 / -1

The maximum current that flows through a fuse wire before it blows out varies with its radius as

A
r^3/2

B
r

C
r^2/3

D
r^1/2

Solution
Question 7
4 / -1

A 100 watt bulb working on 200 volt and a 200 watt bulb working on 100 volt have

A
Resistances in the ratio of 4 : 1

B
Maximum current ratings in the ratio of 1 : 4

C
Resistances in the ratio of 2 : 1

D
Maximum current ratings in the ratio of 1 : 2

Solution
Question 8
4 / -1

There are two electric bulbs of 40 W and 100 W. Which one will be brighter when first connected in series and then in parallel

A
40 W in series and 100 W in parallel

B
100 W in series and 40 W in parallel

C
40 W both in series and parallel will be uniform

D
100 W both in series and parallel will be uniform

Solution
Question 9
4 / -1

When two resistances R₁ and R₂ are connected in series and parallel with 120 V line power consumed will be 25 W and 100 W respectively. Then the ratio of power consumed by R₁ to that consumed by R₂ will be

A
1 : 1

B
1 : 2

C
2 : 1

D
1 : 4

Solution
Question 10
4 / -1

Match the List I with the List II from the combination shown. In the left side (List I) there are four different conditions and in the right side (List II), there are ratios of heat produced in each resistance for each condition

A
I— B; II— A; III— C; IV— D

B
I— C; II— D; III— C; IV— D

C
I— B; II— D; III— A; IV — C

D
I — A; II— B; III — D; IV — C