Current Electricity Test

Result

Current Electricity Test - 114

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Weekly Quiz Competition

Question 1
4 / -1

In the circuit shown, the reading of ammeter when switch S is open and when switch S is closed respectively are

A
3 A and 4 A

B
4 A and 5 A

C
5 A and 6 A

D
6 A and 7 A

Solution
Question 2
4 / -1

In the circuit as shown in figure the

A
Resistance R = 46 Ω

B
Current through 20 Ω resistance is 0.1 A

C
Potential difference across the middle resistance is 2V

D
All option are correct

Solution
Question 3
4 / -1

Given figure shows a rectangular block with dimensions x, 2x and 4x. Electrical contacts can be made to the block between opposite pairs of faces (for example, between the faces labelled A-A, B-B and C-C). Between which two faces would the maximum electrical resistance be obtained (A-A : Top and bottom faces, B-B : Left and right faces, C-C : Front and rear faces)

A
A-A

B
B-B

C
C-C

D
Same for all three pairs

Solution
Question 4
4 / -1

A battery is connected to a uniform resistance wire AB and B is earthed. Which one of the graphs below shows how the current density J varies along AB?

A

B

C

D

Solution
Question 5
4 / -1

A cylindrical metal wire of length l and cross sectional area S, has resistance R, conductance G,conductivity σ and resistivity ρ. Which one of the following expressions for σis valid?

A

B

C

D

Solution
Question 6
4 / -1

A potential divider is used to give outputs of 4 V and 8 V from a 12 V source. Which combination of resistances,(R₁ : R₂ : R₃) gives the correct voltages ?

A
2 : 1 : 2

B
1 : 1 : 1

C
2 : 2 : 1

D
1 : 1 : 2

Solution
Question 7
4 / -1

Find equivalent resistance between A and B

A
R

B

C

D
2R

Solution
Question 8
4 / -1

Following figure shows four situations in which positive and negative charges move horizontally through a region and gives the rate at which each charge moves. Rank the situations according to the effective current through the region greatest first

A
I = ii = iii = iv

B
I > ii > iii > iv

C
I = ii = iii > iv

D
I = ii = iii < iv

Solution
Question 9
4 / -1

A and B are two square plates of same metal and same thickness but length of B is twice that of A. Ratio of resistances of A and B is

A
4 : 1

B
1 : 4

C
1 : 1

D
1 : 2

Solution
Question 10
4 / -1

A moving coil galvanometer is converted into an ammeter reading upto 0.03 A by connecting a shunt of resistance 4r across it and into an ammeter reading upto 0.06 A when a shunt of resistance r is connected across it. What is the maximum current which can be sent through this galvanometer if no shunt is used?

A
0.01 A

B
0.02 A

C
0.03 A

D
0.04 A

Solution