Current Electricity Test

Result

Current Electricity Test - 72

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Weekly Quiz Competition

Question 1
4 / -1

For a cell, the graph between the potential difference (V) across the terminals of the cell and the current (I) drawn from the cell is shown in the figure. The e.m.f. and the internal resistance of the cell are

A
2V, 0.5 Ω

B
2V, 0.4 Ω

C
> 2V, 0.5 Ω

D
> 2V, 0.4 Ω

Solution
Question 2
4 / -1

When a current I is passed through a wire of constant resistance, it produces a potential difference V across its ends. The graph drawn between log I and log V will be

A

B

C

D

Solution
Question 3
4 / -1

The V–i graph for a conductor at temperatures T₁ and T₂are as shown in the figure. (T₂– T₁) is proportional to

A
cos 2θ

B
sin 2θ

C
cot 2θ

D
tan 2θ

Solution
Question 4
4 / -1

A cylindrical conductor has uniform cross–section. Resistivity of its material increases linearly from left end to right end. If a constant current is flowing through it and at a section distance x from left end, magnitude of electric field intensity is E, which of the following graphs is correct?

A

B

C

D

Solution
Question 5
4 / -1

The V–i graph for a conductor makes an angle θ with V–axis. Here V denotes the voltage and i denotes current. The resistance of conductor is given by

A
sin θ

B
cos θ

C
tan θ

D
cot θ

Solution
Question 6
4 / -1

A battery consists of a variable number \'n\' of identical cells having internal resistances connected in series. The terminals of battery are short circuited and the current i is measured. Which of the graph below shows the relationship between i and n

A

B

C

D

Solution
Question 7
4 / -1

In an experiment, a graph was plotted of the potential difference V between the terminals of a cell against the circuit current i by varying load rheostat. Internal conductance of the cell is given by

A

B

C

D

Solution
Question 8
4 / -1

V–i graphs for parallel and series combination of two identical resistors are as shown in figure. Which graph represents parallel combination?

A
A

B
B

C
A and B both

D
Neither A nor B

Solution
Question 9
4 / -1

The ammeter has range 1 ampere without shunt. The range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature

A
P

B
Q

C
R

D
S
Question 10
4 / -1

For the circuit shown in the figure

A
The current I through the battery is 7.5 mA

B
The potential difference across R_L is 18 V

C
Ratio of powers dissipated in R₁ and R₂is 3

D
If R₁ and R₂are interchanged, magnitude of the power dissipated in R_L will decrease by a factor of 9

Solution