Physics

1. mark review The value of current i in the circuit as shown in figure is:

0.2 A

1.6 A

0.8 A

1.8 A

Question 1 of 15

2. mark review 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:

16 Ω

28 Ω

14 Ω

7 Ω

Question 2 of 15

3. mark review When the key K is passed at t = 0, which of the following statements about the current 1 in the resistor AB of the given circuit is ture?

I = 1mA at all t

I = 2mA at all t

At t = 0, I = 2mA and with time it goes to 1mA

I oscillates between 1mA and 2mA

Question 3 of 15

4. mark review The resistance between points A and B is

(√3 + 2)R

(√3 - 1)R

(√3 + 1)R

Question 4 of 15

5. mark review 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

R = R₁R₂/(R₁ – R₂)

R = R₂ – R₁

R = R₁R₂/(R₂ – R₁)

R = R₂ x (R₁ + R₂)/ (R₂ – R₁)

Question 5 of 15

6. mark review The internal resistance of a cell is the resistance of:

Vessel of the cell

Electrodes of the cell

None of these

Electrolyte used in the cell

Question 6 of 15

7. mark review The current in the given circuit is:

0.4 amp

0.2 amp

0.1 amp

0.3 amp

Question 7 of 15

8. mark review A wire of length L is drawn such that its diameter is reduced to half of its original diameter. If the initial resistance of the wire were 10 Ω, its new resistance would be:

120 Ω

160 Ω

80 Ω

40 Ω

Question 8 of 15

9. mark review The temperature of the cold junction of a thermocouple is 0°C and the temperature of the hot junction is T°C. The relation for the thermo emf is given by; E = AT – ½ BT² (when A = 16 and B = 0.08). The temperature of inversion will be:

400°C

500°C

460°C

600°C

Question 9 of 15

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

2 Ω

4 Ω

8 Ω

6 Ω

Question 10 of 15

11. mark review 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

3.5 x 10⁻⁴ Ω

5 x 10⁻⁴ Ω

2.5 x 10⁻⁴ Ω

10 x 10⁻⁴ Ω

Question 11 of 15

12. mark review A moving coil galvanometer is converted into an ammeter reads up to 0.03 A by connecting a shunt of resistance 4r across it and ammeter reads up to 0.06 A, when a shunt of resistance r is used. What is the maximum current which can be sent through this galvanometer is no shunt is used?

0.02 A

0.03 A

0.04 A

0.01 A

Question 12 of 15

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

0.9 A

1/0.9 A

1/9 A

9 A

Question 13 of 15

14. mark review The electro-chemical equivalent of a substance in numerical equal to the mass of the substance deposited if a current I flows through the electrolyte for 0.25 seconds. The value of I is:

Question 14 of 15

15. mark review 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

Less

None of these

Zero

Question 15 of 15

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
Test Help For	Physics Subject Test Prep. All Recruitment Test Prep. B Tech and BDS Test Prep. Medical Test prep. Engineering Test prep. All Admissions Test.

Test By Subject	Physics
Test By Topics	Physics Subject

Test Advisor

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

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

Physics

Leave a Reply Cancel reply