# the rheostat is used in the circuit to mcq

Posted on Ene 1, 2021

Adding Rheostat in Stator Circuit. The ammeter is connected in series circuit (c) The rheostat can only increase the resistance in electric circuit (d)The single key is used to switch on/off the electric circuit . Test the rheostat in this condition for an hour and check that there is no deterioration of wire or Resistance is a passive element in electrical and electronic circuits. For two 1.5 V cells in parallel, the voltage stays at 1.5 V, but the life (current capacity) of the battery is doubled. (b) Superposition theorem. Rheostat is the instrument used to control the current in an electric circuit. The most common way to vary the resistance in a circuit is to use a rheostat. We have Provided Electricity Class 10 Science MCQs Questions with Answers to help students understand the concept very well. Potentiometer (POT) With all three terminals connected to the circuit, pots are generally used … Two terminal trimmers are available, although in most cases three terminal potentiometer trimmer is used as a two terminal rheostat. In case of a large machine the size of the rheostat will be large and in such case it is not easily portable. Brief History Multiple Choice Question (MCQ) of Electronics page-17:241. Rheostat is generally used in the applications where high voltage or current is required. Commonly available resistors have a fixed value and are used for restricting smaller values of electric current. Both speed and torque can be controlled by armature voltage control, armature rheostat control, and chopper control methods. rheostat (rē`əstăt'), device whose resistance to electric current depends on the position of some mechanical element or control in the device.Typically a rheostat consists of a resistance element equipped with two contacts, or terminals, by which it is attached to a circuit: a fixed contact at one end and a sliding contact that can be moved along the resistance element. The resistances generate huge losses and generate heat in the system. If we increase the resistance of the rheostat, the flow of electric current through the light bulb decreases. c) The saturation voltage V CE for silicon transistor is same as that for germanium. Which of the following statement is true? These motors are used where the motor speed below the base speed is required as they cannot be operated above the base speed. It is used to change the resistance in the circuit. In this post, you'll learn the 3 essential differences between both. The following circuit contains two resistors. « Back CONTENTS Next » 1. Magnetic Circuit; DC Generator; DC Machine; MCQ.