MCQ
How many resistances are used in a Wheatstone bridge?
- A3
- B4
- C5
- D6
✓
Answer
- 4
Explanation:
Wheatstone bridge is an arrangement of four resistors P, Q, R, and S, such that if we know the value of the resistances of any three of them, we can obtain the value of fourth unknown resistance. Therefore, there are 4 resistances in a Wheatstone bridge.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
‘X’ is a type of commercial resistor made from a mixture of clay, carbon black, and resin binder which are pressed and then molded into cylindrical rods by heating. Identify X.
Some charge is being given to a conductor. Then its potential:
The activity of a sample of a radioactive material is A, at time 
and 
at time 
. If its mean life T, then
|
(a) |
(d) |
(c) |
(d) |
A wire carrying a current i is placed in a uniform magnetic field in the form of the curve y = asin
0 ≤ x ≤ 2L. The force acting on the wire is
|
(a) |
(b) iBL |
(c) 2iBL |
(d) Zero |
A coil with 100 turns has an inductance of 0.05H and 0.02A current is passed through it. Flux linked with the coil is
The breaking stress of a wire depends on:
- Material of the wire.
- Length of the wire.
- Radius of the wire.
- Shape of the cross-section.
Which of the following is not equal to watt
|
(a) |
(b) Amp / Volt |
(c) Amp × Volt |
(d) Joule / sec |
In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called
|
(a) Neutral temperature |
(b) Temperature of inversion |
|
(c) Both the above |
(d) None of the above |
The capacitance of an air capacitor is $5 \mu F$. If mica is completely used in place of air in the same capacitor, then the capacitance becomes $30 \mu F$, the dielectric constant of mica will be:
→In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?