Current Electricity Test

Result

Current Electricity Test - 16

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Weekly Quiz Competition

Question 1
4 / -1

The current in a simple series circuit is 5.0 A, When an additional resistance of 2.0 Ω is inserted, the current drops to 4.0 A. The original resistance of the circuit in ohm was

A
1.25

B
8

C
10

D
20

Solution
Question 2
4 / -1

A battery of emf 2 V and internal resistance 0.1Ω is being charged by a current of 5 A. The potential difference between the terminals of the battery is

A
2.5 V

B
1.5 V

C
0.5 V

D
1 V
Question 3
4 / -1

An energy source will supply a constant current into, the load, if its internal resistance is

A
equal to the resistance of the load

B
very large as compared to the load resistance

C
zero

D
non-zero but less than the resistance of the load

Solution
Question 4
4 / -1

The n rows each containing m cells in series are joined in parallel. Maximum current is taken from this combination across an external resistance of 3Ω resistance. If the total number of cells used are 24 and internal resistance of each cell is 0.5 Ω, then

A
m = 8, n = 3

B
m = 6, n = 4

C
m = 12, n = 2

D
m = 2, n = 12

Solution
Question 5
4 / -1

The figure shows a network of currents. The magnitude of current is shown below.The current I will be

A
3 A

B
9 A

C
13 A

D
19 A

Solution
Question 6
4 / -1

A galvanometer has current range of 15 mA and voltage range 750 mV. To convert this galvanometer into an ammeter of range 25 A, the required shunt is

A
0.8Ω

B
0.93Ω

C
0.03Ω

D
2.0Ω

Solution
Question 7
4 / -1

The daniel cell is balanced on 125 cm length of a potentiometer. Now, the cell is short circuited by a resistance of 20 and the balance is obtained at 100 cm. The internal resistance of the daniel cell is

A

B
1.5Ω

C
1.25Ω

D
0.5Ω

Solution
Question 8
4 / -1

An ammeter and a voltmeter of resistance R are connected in series to an electric cell of negligible internal rsistance. Their reading are A and V respectively. If another resistance R is connected in parallel with the voltmeter, then

A
both A and V increase

B
both A and V will decrease

C
A will decrease and V will increase

D
A will increase andV will decrease
Question 9
4 / -1

In a potentiometer of a cell of emf 1.25 V gives balancing length of 30 cm.If the cell is replaced by another cell, balancing length is found to be 40 cm. What is the emf of second cell?

A
≃ 1.57 V

B
≃ 1.67 V

C
≃ 1.47 V

D
≃ 1.37 V

Solution
Question 10
4 / -1

What is the value of shunt resistance required to convert a galvanometer of resistance 100Ω into an ammeter of range 1 A? Given, full scale deflection of the galvanometer is 5mA

A

B

C
0.5 Ω

D
0.05 Ω

Solution