Download App

Current Electricity — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsCurrent Electricity1 Mark
MCQ
What is the primary function of a Rheostat?
  • ✓
    Depending on our need, we can increase or decrease resistance.
  • B
    It actually provide high voltage AC current
  • C
    It actually provide high voltage DC current
  • D
    It helps to control temperature of thermal system
✓

Answer

Correct option: A.
Depending on our need, we can increase or decrease resistance.
(a)
Depending on our need, we can increase or decrease resistance.
Explanation:
A rheostat is a device used to regulate the resistance of an electric circuit.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ" from Current Electricity→Current Electricity — all question types→Physics STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

Which of the following is non-ohmic resistance?
→
If 'r' is the internal resistance of a cell, such that 'E' is its e.m.f., V is potential difference and R is the external resistance of circuit then the expression for internal resistance is:
→
The deviation produced in case of an equiangular prism is called:
→
The radiation suffering the maximum deflection in a magnetic field is:

  • α - particles

  • β - particles

  • X - rays

  • γ - radiations

→
The correct relationship between the mechanical advantage (M.A), the velocity ratio (V.R) and the efficiency (n) is : ________ .
→
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
→
A heater draws a current of 5A at 220V for 2 minutes. The energy released by heater in kilojoules is:
→
Sound travels in the form of ___________ .
→
A radiations A is focused by a proper device on the bulb of a thermometer. Mercury in the thermometer shows a rapid increase. The radiations A is : ________ .
→
A villager uses a single fixed pulley while a person in urban areas uses the combination of single fixed and single movable pulley. Which out of the two are more effective?
→