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Current Electricity, Thermal & Chemical Effect of Current Test Online MCQs

Test Name Current Electricity, Thermal & Chemical Effect of Current MCQs Test
Subject Physics
Test Type MCQs
Total Question 15
Total Marks 30
Total Time 15 Mints
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Multiple Choice Questions about the topic of Current Electricity, Thermal & Chemical Effect of Current. Attempt all the questions for the preparation of physic subject test, admission test, engineering test and medical test. Current Electricity, Thermal & Chemical Effect of Current Test Online MCQs below.

Current Electricity, Thermal & Chemical Effect of Current Test Online MCQs

Physics

1. Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R₁ and R₂ (R₂ > R₁). If the potential difference across the source having internal resistance R₂ is zero, then

 

Question 1 of 15

2. A potentiometer is connected between A and B and the balance point is obtained at 203.6 cm. When the end of the potentiometer connected to B is shifted to C, then the balance point is obtained at 24.6 cm. If now the potentiometer be connected between B and C, the balance point will be at

 

30

Question 2 of 15

3. In the given figure, the equivalent resistance between two points A and B will be:

 

 

98

Question 3 of 15

4. Two resistances equal at 0°C with temperature coefficient of resistance α₁ and α₂ joined in series act as a single resistance in a circuit. The temperature coefficient of their single resistance will be:

 

Question 4 of 15

5. A wire of radius r has resistance R. If it is stretched to a radius r/2, its resistance will be:

 

Question 5 of 15

6. The resistance of a galvanometer is 50 Ω and current required to give full scale deflection is 100 μA in order to convert it into an ammeter for reading up to 10A. It is necessary to put an resistance of

 

Question 6 of 15

7. When the power delivered by a 100 volt battery is 40 watts the equivalent resistance of the circuit is:

 

Question 7 of 15

8. Same length of two identical wires are first connected is series and then in parallel, then the amount of heat produced in both the conditions are in the ratio:

 

Question 8 of 15

9. What is the equivalent resistance across A and B in the figure shown, if R = 3Ω?

 

28

Question 9 of 15

10. Four wires of the same diameter are connected in turn between two points, maintained at a constant potential difference. Their resistivities are; p and L (wire 1)., 1.2p and 1.2L (wire 2), 0.9 p and 0.9L (wire 3) and p and 1.5 L (wire 4). Rank the wires according to the rates at which energy is dissipated as heat, greatest first

 

Question 10 of 15

11. A battery of e.m.f. 20 V and internal resistance 6Ω is connected to a resistor as shown in figure. If the current in the circuit is 1 amp, the resistance of the resistor will be:

 

 

20

Question 11 of 15

12. In the figure shown, the capacity of the condenser C is 2μF. The current in 2Ω resistance is

 

25

Question 12 of 15

13. The internal resistance of a cell is the resistance of: 

 

Question 13 of 15

14. Two filaments of same length are connected first in series then in parallel. For the same amount of main current flowing, the ratio of the heat produced is:

 

Question 14 of 15

15. Two identical galvanometers are taken, one is to be converted into an ammeter and other into a milliammeter. Shunt of milliammeter compared to ammeter is

 

Question 15 of 15


 

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