Current Electricity-Electrical Resistance [BITSAT (Birla Institute of Technology & Science Admission Test) Physics]: Questions 1 - 5 of 5
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Question 1
Question MCQ▾
When current flows in a conductor, then the ratio of the intensity of electric field at any point within the conductor and the current density at a point is called –
Choices
Choice (4) | Response | |
---|---|---|
a. | Inductance | |
b. | Specific resistance | |
c. | Resistance | |
d. | Conductance |
Question 2
Question MCQ▾
The resistance of a long wire is . The wire is stretched to form a uniform wire of length. The resistance now will be –
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 3
Question MCQ▾
If a copper wire is stretched to make its radius decrease , then change in its resistance is approximately,
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 4
Appeared in Year: 2021
Question MCQ▾
A wire of a certain material is stretched slowly by ten per cent. Its new resistance and specific resistance become respectively:
Choices
Choice (4) | Response | |
---|---|---|
a. | times, same | |
b. | times, times | |
c. | times, times | |
d. | Question does not provide sufficient data or is vague |
Question 5
Appeared in Year: 2019
Question MCQ▾
Twelve resistors each of resistance are connected in the circuit as shown. The net resistance between A and B is
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |