Current Electricity Test

Result

Current Electricity Test - 52

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Weekly Quiz Competition

Question 1
4 / -1

A primary cell has an e.m.f. of 1.5 volt, when short-circuited it gives a current of 3 ampere. The internal resistance of the cell is

A
4.5 ohm

B
2 ohm

C
0.5 ohm

D
1/4.5 Ω

Solution
Question 2
4 / -1

A new flashlight cell of e.m.f. 1.5 volt gives a current of 15 amp, when connected directly to an ammeter of resistance 0.04 Ω. The internal resistance of cell is

A
0.04 Ω

B
0.06 Ω

C
0.10 Ω

D
10 Ω

Solution
Question 3
4 / -1

Calculate the value of E, for given circuit, when value of 2 amp current is either flowing in clockwise or anticlockwise direction

A
3 V, 28 Volt

B
38 V, 2 Volt

C
3 V, 30 Volt

D
3 V, 2.8 Volt

Solution
Question 4
4 / -1

Three identical resistances A, B and C are connected as shown in fig.
The heat produced will be maximum

A
In B

B
In B and C

C
In A

D
Same for A, B and C

Solution
Question 5
4 / -1

To get the maximum current from a parallel combination of n identical cells each of internal resistance r and external resistance R, when

A
R >> r

B
R << r

C
R = r

D
None of these

Solution
Question 6
4 / -1

The internal resistances of two cells shown are 0.1 Ω and 0.3 Ω. If R = 0.2 Ω, the potential difference across the cell

A
B will be zero

B
A will be zero

C
A and B will be 2V

D
A will be > 2V and B will be < 2V

Solution
Question 7
4 / -1

A torch battery consists of two cells of 1.45 volt and an internal resistance 0.15 Ω. If each cell sends current through the filament of the lamps having resistance 1.5 ohm, the value of current will be

A
16.11 amp

B
1.611 amp

C
0.1611 amp

D
2.6 amp

Solution
Question 8
4 / -1

The electromotive force of a primary cell is 2 volt. When it is short-circuited it gives a current of 4 ampere. Its internal resistance in ohm is

A
0.5

B
5.0

C
2.0

D
8.0

Solution
Question 9
4 / -1

The figure shows a network of currents. The magnitude of currents is shown here. The current i will be

A
3 A

B
13 A

C
23 A

D
–3 A
Question 10
4 / -1

A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true?

A
Potential difference across the terminals of the battery is maximum when R = r

B
Power delivered to the resistor is maximum when R = r

C
Current in the circuit is maximum when R = r

D
Current in the circuit is maximum when R >>r