A translational potentiometer has the resistance wire wound around a card of length 20 mm. If the number of turns is 40 per mm, find the resolution of the potentiometer.
A simple slide wire is used to measure current in the circuit. The voltage drops across a standard resistor of 0.2Ω is balanced at 80cm. The magnitude of current if the standard emf of 2V is balanced at 60cm?
The four arms of a bridge are:
Arm ab: A capacitor of 0.5 μF in parallel with a resistance of 400 ohm.
Arm bc: 300 Ω resistance
Arm cd: 900 Ω resistance
Arm da: A capacitor 2 μF in series with resistance R2
The bridge is supplied with a sinusoidal voltage, the frequency at which the bridge will balance is
For the bridge circuit shown in below figure find the value of R and C in a condition when bridge is balanced.
C2 = 0.05 μF, R3 = 20 kΩ
C4 = 300 pF, R4 = 1.2 kΩ
What is the frequency of oscillation of the circuit shown is
A potentiometer wire is 10 m long. It has a resistance of It is connected in series with a battery of e.m.f. 3 V and a resistance of . The potential gradient along the wire in volt/meter is